參數(shù)資料
型號: UPD17149GTA1
廠商: NEC Corp.
英文描述: SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 小,通用4位單晶片微控制器
文件頁數(shù): 51/102頁
文件大小: 408K
代理商: UPD17149GTA1
51
μ
PD17145(A1), 17147(A1), 17149(A1)
Figure 15-1. Block Diagram of Serial Interface
Caution
The output latch of the shift register is independent of the output latch of P0D
1
. Therefore,
even if an output instruction is executed to P0D
1
, the status of the output latch of the shift
register is not affected. The output latch of the shift register is cleared to “0” by RESET
input. After that, it holds the status of the LSB of the previously transferred data.
P0D
2
/SI
P0D
1
/SO
P0D
0
/SCK
Shift register (SIOSFR)
P0D
1
output latch
Serial clock
counter
Clear
Selector
SIOTS
SIOHIZ
SIOCK1
SIOCK0
IRQSIO
clear signal
IRQSIO
set signal
One shot
f
x
/
f
x
/
f
x
/
SIOEN
P0DBIO0
P0DBIO1
Q
S
R
Output
latch
LSB
MSB
Clock
Carry
P0D
0
output latch
S
S
S
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