UPD75518 NEC, UPD75518 Datasheet - Page 106
UPD75518
Manufacturer Part Number
UPD75518
Description
4 BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC
Datasheet
1.UPD75518.pdf
(180 pages)
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Master device processing (transmitter)
Transfer line
Slave device processing (receiver)
Program processing
Program processing
Hardware operation
Hardware operation
SCK0 pin
SB0 pin
Set
CMDT
Fig. 4-49 Address Transmission from Master Device to Slave Device (WUP = 1)
Set
CMDD
Set
RELT
Clear
CMDD
Set
RELD
Set
CMDT
Set
CMDD
Write
to SIO0
1
A7
2
A6
3
A5
Serial transmission
Serial reception
4
Address
A4
5
A3
6
A2
7
A1
8
A0
(When SVA = SIO0)
9
Generate
IRQCSI0
Generate
IRQCSI0
Interrupt handling (preparation for next serial transfer)
WUP
0
Output
ACK
Set
ACKT
ACK
Output
BUSY
Set
ACKD
BUSY
Clear
BUSY
Clear
BUSY
READY
Stop
SCK0
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