參數(shù)資料
型號: UPD72042B
廠商: NEC Corp.
英文描述: LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
中文描述: LSI器件間設(shè)備BusTM(IEBusTM)協(xié)議控制
文件頁數(shù): 26/92頁
文件大小: 541K
代理商: UPD72042B
μ
PD72042A, 72042B
26
DATA SHEET S13990EJ2V0DS00
3.2.2 Two-Wire Data Transfer (SEL = 0)
(1) Control mode
When the C/D input is set high, control mode is set to control data transfer. Data transfer control involves the
following processing.
1
Register address setting
2
Register read/write selection
(a)
μ
PD72042A (starting with MSB)
C/D
SCK
SIO
A3
A2
A1
A0
R
/
W
×
×
×
(b)
μ
PD72042B (starting with LSB)
C/D
SCK
SIO
R
/
W
×
×
×
A0
A1
A2
A3
Remark
After reset (RESET) cancellation, the state enabling writing to the register at address 0000B is set.
Caution In control mode, each data item is read every eighth clock pulse. (Data of less than eight clock
periods is ignored.)
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