DATA SHEET
µ
PD784915B, 784916B
16-BIT SINGLE-CHIP MICROCONTROLLERS
MOS INTEGRATED CIRCUIT
DESCRIPTION
The
µ
PD784915B, 784916B are members of the NEC 78K/IV Series of microcontrollers equipped with a high-
speed 16-bit CPU and are versions with improved electrical characteristics of the
µ
PD784915A, 784916A of the
µ
PD784915 Subseries.
This series contains many peripheral hardware units ideal for VCR control, such as a multi-function timer unit
(super timer unit) suitable for software servo control and VCR analog circuits.
A one-time PROM version of the
µ
PD784916B, the
µ
PD78P4916, is also available.
Detailed function descriptions are provided in the following user’s manuals. Be sure to read them before
designing.
µ
PD784915 Subseries User’s Manual - Hardware: U10444E
78K/IV Series User’s Manual - Instruction: U10905E
FEATURES
• High instruction execution speed realized by 16-bit CPU core
• Minimum instruction execution time: 250 ns (with 8-MHz internal clock)
• High internal memory capacity
Part Number
ROM
49152 bytes
63488 bytes
RAM
1280 bytes
µ
PD784915B
µ
PD784916B
• VCR analog circuits conforming to VHS Standard
• CTL amplifier
• RECCTL driver (rewritable)
• CFG amplifier
• DFG amplifier
• DPG comparator
• DPFG separation circuit (ternary separation circuit)
• Reel FG comparator (2 channels)
• CSYNC comparator
• Timer unit (super timer unit) for servo control
• Serial interface: 2 channels (3-wire serial I/O)
• A/D converter: 12 channels (conversion time: 10
µ
s)
• Low-frequency oscillation mode: main system clock frequency = internal clock frequency
• Low-power dissipation mode: CPU can operate with a subsystem clock.
• Supply voltage range: V
DD
= 2.7 to 5.5 V
• Hardware watch function: watch operation at low voltage (V
DD
= 2.7 V (MIN.)) and low current
APPLICATIONS
Control system/servo/timer of VCR
Unless mentioned otherwise, the
µ
PD784916B is described as the representative product.
The information in this document is subject to change without notice
Document No. U13118EJ1V0DS00 (1st edition)
Date Published January 1998 N CP(K)
Printed in Japan
©
1996
1998
µ
PD784915B, 784916B
ORDERING INFORMATION
Part Number
Package
100-pin plastic QFP (14 x 20 mm)
100-pin plastic QFP (14 x 20 mm)
µ
PD784915BGF-xxx-3BA
µ
PD784916BGF-xxx-3BA
Remark
xxx indicates ROM code suffix.
Product Development of 78K/IV Series
: Under mass production
: Under development
I
2
C bus supported
Multimaster I
2
C bus supported
µ
PD784038Y
Standard
µ
PD784225Y
µ
PD784225
80-pin,
ROM correction was enhanced
Multimaster I
2
C bus supported
µ
PD784038
µ
PD784026
Internal memory capacity was enhanced
Pin compatible with
µ
PD784026
Multimaster I
2
C bus supported
Enhanced A/D,
16-bit timer,
and power
management
µ
PD784216Y
µ
PD784216
100-pin
I/O and internal memory capacity
was enhanced
µ
PD784218Y
µ
PD784218
Internal memory capacity was enhanced
ROM correction was added
µ
PD784054
µ
PD784046
ASSP
On-chip 10-bit A/D
µ
PD784955
DC inverter control
µ
PD784908
On-chip IEBus
TM
Controller
µ
PD78F4943
For CD-ROM,
56 Kbytes of flash memory
Multimaster I
2
C bus supported
µ
PD784928Y
µ
PD784928
Function of the
µ
PD784915 was
enhanced
µ
PD784915
On-chip software servo control
VCR analog circuit, enhanced timer
2
µ
PD784915B, 784916B
Function List (1/2)
Item
Internal ROM capacity
Internal RAM capacity
Operating clock
49152 bytes
1280 bytes
16 MHz (internal clock: 8 MHz)
Low frequency oscillation mode: 8 MHz (internal clock: 8 MHz)
Low power dissipation mode: 32.768 kHz (subsystem clock)
Minimum instruction
execution time
I/O ports
Real-time output port
Super
timer
unit
Timer/counter
250 ns (with 8-MHz internal system clock)
input : 8
I/O : 46
µ
PD784915B
63488 bytes
µ
PD784916B
54
11 (including one each for pseudo V
SYNC
, head amplifier switch, and chrominance rotation)
Timer/counter
TM0 (16 bits)
TM1 (16 bits)
FRC (22 bits)
TM3 (16 bits)
UDC (5 bits)
EC (8 bits)
EDV (8 bits)
Input signal
CFG
DFG
HSW
V
SYNC
CTL
T
REEL
S
REEL
Compare register
3
3
-
2
1
4
1
Number of bits
22
22
16
22
16
22
22
Capture register
Remark
-
1
6
1
-
-
For HSW signal generation
-
For CFG signal division
Measurable cycle
125 ns to 524 ms
125 ns to 524 ms
1
µ
s to 65.5 ms
125 ns to 524 ms
1
µ
s to 65.5 ms
125 ns to 524 ms
125 ns to 524 ms
Operating edge
↑
↓
↑
↑
↓
↑
↑
↑
↑
↓
↓
↓
Capture register
VCR special
circuit
• V
SYNC
separation circuit, H
SYNC
separation circuit
• VISS detection, wide aspect detection circuits
• Field identification circuit
• Head amplifier switch/chroma rotation output circuit
Timer
TM2 (16 bits)
TM4 (16 bits)
TM5 (16 bits)
• 16-bit accuracy
• 8-bit accuracy
Compare register
1
1 (capture/compare)
1
: 3 channels (carrier frequency: 62.5 kHz)
: 3 channels (carrier frequency: 62.5 kHz)
Capture register
—
1
—
General-purpose
timer
PWM output
Serial interface
A/D converter
3-wire serial I/O: 2 channels
• BUSY/STRB control (1 channel only)
8-bit resolution
×
12 channels, conversion time: 10
µ
s
3
µ
PD784915B, 784916B
Function List (2/2)
Item
Analog circuit
µ
PD784915B
• CTL amplifier
• RECCTL driver (rewritable)
• DFG amplifier, DPG comparator, CFG amplifier
• DPFG separation circuit (ternary separation circuit)
• Reel FG comparator (2 channels)
• CSYNC comparator
µ
PD784916B
Interrupt
External
Internal
Standby function
4 levels (programmable), vector interrupt, macro service, context switching
9 (including NMI)
19 (including software interrupt)
HALT/STOP mode/low power dissipation mode/low power dissipation HALT mode
STOP mode can be released by input of valid edge of NMI pin, watch interrupt (INTW), or
INTP1/INTP2/KEY0-KEY4 pins
Watch function
Supply voltage
Package
0.5-second measurement, low-voltage operation (V
DD
= 2.7 V)
V
DD
= 2.7 to 5.5 V
100-pin plastic QFP (14
×
20 mm)
4
µ
PD784915B, 784916B
PIN CONFIGURATION (Top View)
•
100-pin plastic QFP (14 x 20 mm)
µ
PD784915BGF-xxx-3BA
µ
PD784916BGF-xxx-3BA
CSYNCIN
REEL0IN/INTP3
REEL1IN
DFGIN
DPGIN
CFGCPIN
CFGAMPO
CFGIN
AV
DD1
AV
SS1
VREFC
CTLOUT2
CTLOUT1
CTLIN
RECCTL-
RECTTL+
CTLDLY
AV
SS2
ANI11
ANI10
P64
P65/HWIN
P66/PWM4
P67/PWM5
P60/STRB/CLO
P61/SCK1/BUZ
P62/SO1
P63/SI1
PWM0
PWM1
SCK2
SO2
SI2/BUSY
V
DD
XT1
XT2
V
SS
X2
X1
RESET
IC
PTO02
PTO01
PTO00
P87/PTO11
P86/PTO10
P85/PWM3
P84/PWM2
P83/ROTC
P82/HASW
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
ANI9
ANI8
P77/ANI7
P76/ANI6
P75/ANI5
P74/ANI4
P73/ANI3
P72/ANI2
P71/ANI1
P70/ANI0
AV
REF
AV
DD2
P96
P95/KEY4
P94/KEY3
P93/KEY2
P92/KEY1
P91/KEY0
P90/ENV
NMI
INTP0
INTP1
INTP2
P00
P01
P02
P03
P04
P05
P06
Caution
Directly connect the IC (Internally Connected) pin to V
SS
.
P80
P57
P56
P55
P54
P53
P52
P51
P50
V
SS
V
DD
P47
P46
P45
P44
P43
P42
P41
P40
P07
5
电源技术
