PD72042B_15 Datasheet, PDF (39/92 Pages) Renesas Technology Corp – LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

µPD72042B
[Control bits]
This control field is used to set the control bits (four bits).
• Contents of control bits
Bit 3^{Note 1}
Bit 2
0H
0
0
1H
0
0
2H
0
0
3H
0
0
4H
0
1
5H
0
1
6H
0
1
7H
0
1
8H
1
0
9H
1
0
AH
1
0
BH
1
0
CH
1
1
DH
1
1
EH
1
1
FH
1
1
Bit 1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Bit 0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Function^{Note 2}
Slave status (SSR) read
Undefined
Undefined
Data read and lock
Lock address read (low-order 8 bits)
Lock address read (high-order 4 bits)
Slave status (SSR) read and unlock
Data read
Undefined
Undefined
Command write and lock
Data write and lock
Undefined
Undefined
Command write
Data write
Notes 1. The value of bit 3 (MSB) determines the transfer direction of the subsequent data-length field data and
data field data.
When bit 3 is set to 1: Data is transferred from the master unit to a slave unit.
When bit 3 is set to 0: Data is transferred from a slave unit to the master unit.
2. 3H, 6H, AH, and BH are control bits used for lock setting and cancellation.
When an undefined value of 1H, 2H, 8H, 9H, CH, or DH is sent, no acknowledgement is returned.
Data Sheet S13990EJ3V0DS
37