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D784927YGF101 Schematic ( PDF Datasheet ) - NEC
| Teilenummer | D784927YGF101 |
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| Beschreibung | UPD784927Y | |
| Hersteller | NEC | |
| Logo |  |
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Gesamt 30 Seiten 
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD784927, 784928, 784927Y, 784928Y
16-BIT SINGLE-CHIP MICROCONTROLLER
DESCRIPTION
The µPD784927 and 784928 are members of the NEC 78K/IV Series of microcontrollers equipped with a high-
speed, high-performance 16-bit CPU for VCR software servo control.
www.DataSheet4U.com The µPD784927Y and 784928Y are based on the µPD784928 with the addition of an I2C bus interface compatible
with multi-master.
They contain many peripheral hardware units ideal for VCR control, such as a multi-function timer unit (super timer
unit) for software servo control and VCR analog circuits.
Flash memory models, the µPD78F4928 and µPD78F4928Y, are under development.
The functions of the µPD784927 is described in detail in the following User’s Manual. Be sure to read this
manual before designing your system.
µPD784928, 784928Y Subseries User’s Manual - Hardware
: U12648E
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
Item
Part Number µPD784927, 784927Y µPD784928, 784928Y
Internal ROM capacity
96K bytes
128K bytes
Internal RAM capacity
2048 bytes
3584 bytes
• VCR analog circuits conforming to VHS Standard
• CTL amplifier
• DFG amplifier
• Reel FG comparator (2 channels)
• RECCTL driver (rewritable) • DPG amplifier
• CSYNC comparator
• CFG amplifier
• DPFG separation circuit (ternary separation circuit)
• Timer unit (super timer unit) for servo control
• Serial interface : 3 channels
• 3-wire serial I/O : 2 channels
• I2C bus interface: 1 channel
• A/D converter: 12 channels (conversion time: 10 µs)
• Low-frequency oscillation mode: main system clock frequency = internal clock frequency
• Low-power consumption mode: CPU can operate with a subsystem clock.
• Supply voltage range: VDD = +2.7 to 5.5 V
• Hardware watch function: watch operation at low voltage (VDD = 2.7 V (MIN.)) and low current consumption
Unless otherwise specified, the µPD784927 is treated as the representative model throughout this document.
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. U12255EJ2V0DS00 (2nd edition)
Date Published December 1999 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1997,1999
 
µPD784927, 784928, 784927Y, 784928Y
• 100-pin plastic QFP (14 × 20 mm)
µPD784927GF-×××-3BA, 784928GF-×××-3BA,
µPD784927YGF-×××-3BA, 784928YGF-×××-3BA
www.DataSheet4U.com
DFGMON/P64/BUZ
DPGMON/P65/HWIN
CFGMON/P66/PWM4
CTLMON/P67/PWM5
P60/STRB/CLO
P61/SCK1/BUZ
P62/SO1
P63/SI1
P37/PWM0
P36/PWM1
P35/SCK2
P34/SO2
P33/SI2/BUSY
VDD
XT1
XT2
VSS
X2
X1
RESET
IC
P32/PTO02
P31/PTO01
P30/PTO00
P87/PTO11
P86/PTO10
SCLNote/P85/PWM3
SDANote/P84/PWM2
P83/ROTC
P82/HASW
10099 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/P111
ANI8/P110
P77/ANI7
P76/ANI6
P75/ANI5
P74/ANI4
P73/ANI3
P72/ANI2
P71/ANI1
P70/ANI0
AVREF
AVDD2
P96
P95/KEY4
P94/KEY3
P93/KEY2
P92/KEY1
P91/KEY0
P90/ENV
NMI/P20
INTP0/P21
INTP1/P22
INTP2/23
P00
P01
P02
P03
P04
P05
P06
Note Pins SCL and SDA are provided for the µPD784928Y subseries only.
Caution Directly connect the IC (Internally Connected) pins to VSS.
6 Data Sheet U12255EJ2V0DS00
6 Page 
µPD784927, 784928, 784927Y, 784928Y
1. DIFFERENCE BETWEEN µPD784928 SUBSERIES AND 784928Y SUBSERIES
The µPD78F4928 and 78F4928Y are based on the µPD784927 and 784927Y and are provided with a 128K-byte
flash memory instead of a mask ROM.
Table 1-1 shows the differences between the products in the µPD784928 subseries and 784928Y subseries.
Table 1-1. Differences between µPD784928 Subseries and 784928Y Subseries
www.DataSheet4U.com
Item
Part Number
µPD784927,
µPD784927Y
µPD784928,
µPD784928Y
Internal ROM
Mask ROM
96K bytes
128K bytes
Internal RAM
2048 bytes
3584 bytes
Internal memory capacity
select register (IMS)
Not provided
IC pin
Provided
VPP pin
Not provided
Electrical characteristics Refer to the Data Sheet of each product.
µPD78F4928,
µPD78F4928Y
Flash memory
Provided
Not provided
Provided
12 Data Sheet U12255EJ2V0DS00
12 Page | ||
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