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參數(shù)資料
| 型號： | μPD78P078Y |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 19/84頁 |
| 文件大小： | 472K |
| 代理商： | ΜPD78P078Y |
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19
m
PD78P078Y
(2)
Non-port pins (2/2)
Pin Name
Input/Output
Function
After Reset
Alternate Function
A0 to A7
Output
Low-order address bus at external memory expansion.
Input
P80 to P87
A8 to A15
Output
High-order address bus at external memory expansion.
Input
P50 to P57
RD
Output
External memory read operation strobe signal output.
Input
P64
WR
External memory write operation strobe signal output.
Input
P65
WAIT
Input
Wait insertion at external memory access.
Input
P66
ASTB
Output
Strobe output which latches the address data output for
Input
P67
ports 4, 5 and 8 to access external memory.
ANI0 to ANI7
Input
A/D converter analog input.
Input
P10 to P17
ANO0, ANO1
Output
D/A converter analog output.
Input
P130, P131
AV
REF0
Input
A/D converter reference voltage input.
—
—
AV
REF1
Input
D/A converter reference voltage input.
—
—
AV
DD
—
A/D converter analog power supply. Connected to V
DD
.
—
—
AV
SS
—
A/D and D/A converters ground potential. Connected to V
SS
.
—
—
RESET
Input
System reset input.
—
—
X1
Input
Main system clock oscillation crystal connection.
—
—
X2
—
—
—
XT1
Input
Subsystem clock oscillation crystal connection.
Input
P07
XT2
—
—
—
V
DD
—
Positive power supply.
—
—
V
PP
—
High-voltage applied during program write/verification.
—
—
Connected directly to V
SS
in normal operating mode.
V
SS
—
Ground potential.
—
—
2.2
Pins in PROM Programming Mode
Pin Name
Input/Output
Function
RESET
Input
PROM programming mode setting
When +5 V or +12.5 V is applied to the V
PP
pin and a low level signal is applied to the RESET
pin, this chip is set in the PROM programming mode.
V
PP
Input
PROM programming mode setting and high-voltage applied during program write/verification.
A0 to A16
Input
Address bus
D0 to D7
Input/output
Data bus
CE
Input
PROM enable input/program pulse input
OE
Input
Read strobe input to PROM
PGM
Input
Program/program inhibit input in PROM programming mode.
V
DD
—
Positive power supply
V
SS
—
Ground potential
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