To our customers,
Old Company Name in Catalogs and Other Documents
On April 1
st
, 2010, NEC Electronics Corporation merged with Renesas Technology
Corporation, and Renesas
Electronics Corporation
took over all the business of both
companies.
Therefore, although the old company name remains in this document, it is a valid
Renesas
Electronics document. We appreciate your understanding.
Renesas Electronics website:
http://www.renesas.com
April 1
st
, 2010
Renesas Electronics Corporation
Issued by:
Renesas Electronics Corporation
(http://www.renesas.com)
Send any inquiries to
http://www.renesas.com/inquiry.
Notice
1.
All information included in this document is current as of the date this document is issued. Such information, however, is
subject to change without any prior notice. Before purchasing or using any Renesas Electronics products listed herein, please
confirm the latest product information with a Renesas Electronics sales office. Also, please pay regular and careful attention to
additional and different information to be disclosed by Renesas Electronics such as that disclosed through our website.
Renesas Electronics does not assume any liability for infringement of patents, copyrights, or other intellectual property rights
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Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of
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and information in the design of your equipment. Renesas Electronics assumes no responsibility for any losses incurred by
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“Standard”:
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
(Note 1) “Renesas Electronics” as used in this document means Renesas Electronics Corporation and also includes its majority-
owned subsidiaries.
(Note 2) “Renesas Electronics product(s)” means any product developed or manufactured by or for Renesas Electronics.
7546 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0160-0122
Rev.1.22
Mar 13, 2009
DESCRIPTION
The 7546 Group is the QzROM version of 7542 Group.
The 7546 Group has the pin-compatibility with the 7542 Group. As
new functions, the power-on reset, the low voltage detection cir-
cuit, and the function set ROM are added.
•
•
•
•
FEATURES
•
•
•
•
•
•
•
•
•
•
•
Basic machine-language instructions ...................................... 71
The minimum instruction execution time ............................. 0.25
µs
(at 8 MHz oscillation frequency, double-speed mode for the
shortest instruction)
Memory size
ROM ................................ 8K, 16K bytes
RAM ............................... 384, 512 bytes
Programmable I/O ports ........................................................... 25
Interrupts ................................................. 18 sources, 16 vectors
Timers ............................................................................. 8-bit
✕
2
...................................................................................... 16-bit
✕
2
Output compare ............................................................ 4-channel
Input capture ................................................................ 2-channel
Serial interface ............ 8-bit
✕
2 (UART or Clock-synchronized)
A/D converter ............................................... 10-bit
✕
6 channels
Clock generating circuit ............................................. Built-in type
(low-power dissipation by an on-chip oscillator)
(connected to external ceramic resonator or quartz-crystal
oscillator permitting RC oscillation)
•
•
Watchdog timer ............................................................ 16-bit
✕
1
Power-on reset circuit ............................................... Built-in type
Low voltage detection circuit ..................................... Built-in type
Power source voltage
X
IN
oscillation frequency at ceramic oscillation, in double-speed mode
At 8 MHz .................................................................... 4.5 to 5.5 V
At 6.5 MHz ................................................................. 4.0 to 5.5 V
At 2 MHz .................................................................... 2.4 to 5.5 V
At 1 MHz .................................................................... 2.2 to 5.5 V
X
IN
oscillation frequency at ceramic oscillation, in high-speed
mode or middle-speed mode
At 8 MHz .................................................................... 4.0 to 5.5 V
At 4 MHz .................................................................... 2.4 to 5.5 V
At 2 MHz .................................................................... 2.2 to 5.5 V
X
IN
oscillation frequency at RC oscillation in high-speed mode or
middle-speed mode
At 4 MHz .................................................................... 4.0 to 5.5 V
At 2 MHz .................................................................... 2.4 to 5.5 V
At 1 MHz .................................................................... 2.2 to 5.5 V
X
IN
oscillation frequency at on-chip oscillation ......... 1.8 to 5.5 V
Power dissipation ................................................ 29.5 mW (Typ.)
Operating temperature range ................................... –20 to 85 °C
REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 1 of 100
7546 Group
24 23 22 21 20 19 18 17
P0
7
(LED
07
)/S
RDY2
P1
0
/R
X
D
1
/CAP
0
P1
1
/T
X
D
1
P1
2
/S
CLK1
P1
3
/S
RDY1
P1
4
/CNTR
0
P2
0
/
AN
0
P2
1
/
AN
1
P0
6
(LED
06
)/S
CLK2
P0
5
(LED
05
)/TxD
2
P0
4
(LED
04
)/RxD
2
P0
3
(LED
03
)/TX
OUT
P0
2
(LED
02
)/CMP
1
P0
1
(LED
01
)/CMP
0
P0
0
(LED
00
)/CAP
0
P3
7
(LED
17
)/INT
0
PIN CONFIGURATION (TOP VIEW)
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
16
15
14
M37546Gx-XXXGP
M37546GxGP
13
12
11
10
9
P3
4
(LED
14
)
P3
3
(LED
13
)/INT
1
P3
2
(LED
12
)/CMP
3
P3
1
(LED
11
)/CMP
2
P3
0
(LED
10
)/CAP
1
V
SS
X
OUT
X
IN
Package type: PLQP0032GB-A (32P6U-A)
Fig. 1 Pin configuration (Package type: PLQP0032GB-A)
P1
2
/S
CLK1
P1
3
/S
RDY1
P1
4
/CNTR
0
P2
0
/AN
0
P2
1
/AN
1
P2
2
/AN
2
P2
3
/AN
3
P2
4
/AN
4
P2
5
/AN
5
V
REF
RESET
CNV
SS
V
CC
X
IN
X
OUT
V
SS
P2
2
/AN
2
P2
3
/AN
3
P2
4
/AN
4
P2
5
/AN
5
V
REF
RESET
CNV
SS
V
CC
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1
2
3
4
5
P1
1
/T
X
D
1
P1
0
/R
X
D
1
/CAP
0
P0
7
(LED
07
)/S
RDY2
P0
6
(LED
06
)/S
CLK2
P0
5
(LED
05
)/TxD
2
P0
4
(LED
04
)/RxD
2
P0
3
(LED
03
)/TX
OUT
P0
2
(LED
02
)/CMP
1
P0
1
(LED
01
)/CMP
0
P0
0
(LED
00
)/CAP
0
P3
7
(LED
17
)/INT
0
P3
4
(LED
14
)
P3
3
(LED
13
)/INT
1
P3
2
(LED
12
)/CMP
3
P3
1
(LED
11
)/CMP
2
P3
0
(LED
10
)/CAP
1
M37546Gx-XXXSP
M37546GxSP
6
7
8
9
10
11
12
13
14
15
16
Package type: PRDP0032BA-A (32P4B)
Fig. 2 Pin configuration (Package type: PRDP0032BA-A)
REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 2 of 100
7546 Group
P0
3
(LED
03
)/TX
OUT
P0
2
(LED
02
)/CMP
1
P0
1
(LED
01
)/CMP
0
P0
0
(LED
00
)/CAP
0
P0
4
(LED
04
)/RxD
2
P0
5
(LED
05
)/TxD
2
P3
7
(LED
17
)/INT
0
P3
4
(LED
14
)
27 26 25 24 23 22 21 20 19
P0
6
(LED
06
)/S
CLK2
P0
7
(LED
07
)/S
RDY2
P1
0
/RxD
1
/CAP
0
P1
1
/TxD
1
P1
2
/S
CLK1
P1
3
/S
RDY1
P1
4
/CNTR
0
P2
0
/AN
0
P2
1
/AN
1
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
18
17
16
[N.C.]
P3
3
(LED
13
)/INT
1
P3
2
(LED
12
)/CMP
3
P3
1
(LED
11
)/CMP
2
P3
0
(LED
10
)/CAP
1
Vss
X
OUT
X
IN
[N.C.]
M37546Gx-XXXHP
M37546GxHP
[N.C.]
15
14
13
12
11
10
Vcc
P2
2
/AN
2
P2
3
/AN
3
P2
4
/AN
4
P2
5
/AN
5
Package type: PWQN0036KA-A (36PJW-A)
Fig. 3 Pin configuration (Package type: PWQN0036KA-A)
REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 3 of 100
RESET
CNVss
[N.C.]
V
REF
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