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參數(shù)資料
| 型號： | 6P8A |
| 廠商： | NEC Corp. |
| 英文描述： | MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION |
| 中文描述： | 馬鞍山集成電路4位單片機(jī)的紅外遙控傳輸 |
| 文件頁數(shù)： | 64/95頁 |
| 文件大?。?/td> | 692K |
| 代理商： | 6P8A |
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64
μ
PD6P8, 6P8A, 6P8B
Data Sheet U17848EJ3V0DS
13.WRITING AND VERIFICATION OF ONE-TIME PROM (PROGRAM MEMORY) (
μ
PD6P8A, 6P8B)
The program memory built into the
μ
PD6P8A and 6P8B is a one-time PROM of 2026
×
10 bits.
Writing or verification of this one-time PROM is performed using the pins listed in Table 13-1, and a 5-bit
instruction and 5-bit data via serial communication. The assembler output has an 8-bit configuration, so mask the
higher three bits and program the lower five bits.
Table 13-1. Pins Used During Program Memory Writing/Verification
Pin No.
Symbol
Function
I/O
2
SO
Serial data output during program memory verification
Output
3
SCLK
Clock input during program memory writing or verification
Input
4
SI
Serial data input during program memory writing
Input
6
V
DD
Power supply
–
Supply +3 V to this pin during program memory writing or verification.
7
X
OUT
Clock required during program memory writing or verification. Connect a
–
8
X
IN
4 MHz ceramic resonator to these pins.
Input
9
GND
GND
–
10
V
PP
Voltage application pin during program memory writing or verification.
–
Apply +10.5 V to this pin.
13.1 Initialization
When a high voltage (10.5 V) is supplied to V
PP
, the programming mode is set after about 1 ms.
In the programming mode, pins not used for programming are pulled down internally, so leave them open.
S1/LED is set to output mode (H) when 3 V is supplied to V
DD
and V
PP
. When a high voltage (10.5 V) is supplied
to V
PP
, the input mode is set after about 1 ms.
Serial communication is performed in 5-bit units, starting from the MSB.
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