DATA SHEET
µ
PD784915A, 784916A
16-BIT SINGLE-CHIP MICROCONTROLLERS
MOS INTEGRATED CIRCUIT
DESCRIPTION
The
µ
PD784915A, 784916A are members of the NEC 78K/IV Series of microcontrollers equipped with a high-
speed 16-bit CPU and are the successors of the 78K/I Series 8-bit single-chip microcontrollers for VCR software
servo control.
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
PD784916A, the
µ
PD78P4916, is also available.
The functions of the
µ
PD784916A are described in detail 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
48 Kbytes
62 Kbytes
RAM
1280 bytes
µ
PD784915A
µ
PD784916A
• 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
PD784916A is described as the representative product.
The information in this document is subject to change without notice
Document No. U11022EJ1V0DS00 (1st edition)
Date Published July 1997 N
Printed in Japan
The mark
shows major revised points.
©
1996
µ
PD784915A, 784916A
ORDERING INFORMATION
Part Number
Package
100-pin plastic QFP (14 x 20 mm)
100-pin plastic QFP (14 x 20 mm)
µ
PD784915AGF-xxx-3BA
µ
PD784916AGF-xxx-3BA
Remark
xxx indicates a ROM code number.
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 pins,
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 pins,
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
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
PD784915A, 784916A
Function List (1/2)
Item
Internal ROM capacity
Internal RAM capacity
Operating clock
48 Kbytes
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 ex-
ecution time
I/O ports
54
Real-time output port
Timer/counter
input : 8
I/O : 46
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)
Capture register
Input signal
CFG
DFG
Super
timer
unit
HSW
V
SYNC
CTL
T
REEL
S
REEL
VCR special circuit
Compare register
3
3
-
2
1
4
1
Number of bits
22
22
16
22
16
22
22
Capture register
-
1
6
1
-
-
-
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
For HSW signal generation
For CFG signal division
Operating edge
↑
↑
↑
↑
↑
↑
↑
↓
↓
↓
↓
↓
Remark
250 ns (with 8-MHz internal system clock)
µ
PD784915A
64 Kbytes
µ
PD784916A
•
V
SYNC
separation circuit, H
SYNC
separation circuit
•
VISS detection, wide aspect detection circuits
•
Field identification circuit
•
Head amplifier switch/chroma rotation output circuit
General-purpose
timer
Timer
TM2 (16 bits)
TM4 (16 bits)
TM5 (16 bits)
Compare register
1
1 (capture/compare)
1
Capture register
-
1
-
PWM output
Serial interface
A/D converter
•
16-bit accuracy : 3 channels (carrier frequency: 62.5 kHz)
•
8-bit accuracy
: 3 channels (carrier frequency: 62.5 kHz)
3-wire serial I/O: 2 channels
•
BUSY/STRB control (1 channel only)
8-bit resolution x 12 channels, conversion time: 10
µ
s
3
µ
PD784915A, 784916A
Function List (2/2)
Item
Analog circuit
µ
PD784915A
•
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
PD784916A
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 x 20 mm)
4
µ
PD784915A, 784916A
PIN CONFIGURATION (Top View)
•
100-pin plastic QFP (14 x 20 mm)
µ
PD784915AGF-xxx-3BA
µ
PD784916AGF-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) pins 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
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