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參數(shù)資料
| 型號： | μPD78F4218(A) |
| 廠商： | NEC Corp. |
| 英文描述： | 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器) |
| 中文描述： | 8 / 16位單片機(jī)微控制器（8 / 16位單片微控制器） |
| 文件頁數(shù)： | 14/32頁 |
| 文件大?。?/td> | 193K |
| 代理商： | ΜPD78F4218(A) |
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14
μ
PD78F4218
5.2 Pins Other Than Port Pins (2/2)
Pin Name
I/O
Alternate Function
Function
PCL
Output
P23
Clock output (for trimming main system clock and subsystem clock)
BUZ
Output
P24
Buzzer output
RTP0-RTP7
Output
P120-P127
Real-time output port that outputs data in synchronization with
trigger
AD0-AD7
I/O
P40-P47
Low-order address/data bus when external memory is connected
A0-A7
Output
P80-P87
Low-order address bus when external memory is connected
A8-A15
P50-P57
Middle-order address bus when external memory is connected
A16-A19
P60-P63
High-order address bus when external memory is connected
RD
Output
P64
Strobe signal output for read operation of external memory
WR
P65
Strobe signal output for write operation of external memory
WAIT
Input
P66
To insert wait state(s) when external memory is accessed
ASTB
Output
P67
Strobe output to externally latch address information output to ports
4 through 6 and port 8 to access external memory
EXA
Output
P37
Status signal output when external memory is accessed
RESET
Input
—
System reset input
X1
Input
—
To connect main system clock oscillation crystal
X2
—
XT1
Input
—
To connect subsystem clock oscillation crystal
XT2
—
ANI0-ANI7
Input
P10-P17
Analog voltage input for A/D converter
ANO0, ANO1
Output
P130, P131
Analog voltage output for D/A converter
AV
REF0
—
—
To apply reference voltage for A/D converter
AV
REF1
To apply reference voltage for D/A converter
AV
DD
Positive power supply for A/D converter. Connected to V
DD
.
AV
SS
GND for A/D converter and D/A converter. Connected to V
SS
.
V
DD
Positive power supply
V
SS
GND
TEST
V
PP
Directly connect this pin to V
SS
(this pin is for IC test).
V
PP
TEST
Sets flash memory programming mode.
To apply a high voltage when program is written or verified.
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