Serial Shift Data Register (Sdr) - Fujitsu MB90390 Series Hardware Manual

CHAPTER 22 SERIAL I/O
22.2.2

Serial Shift Data Register (SDR)

This serial shift data register stores the serial I/O transfer data. During transfer, the SDR
must not be read or written to.
■ Serial Shift Data Register (SDR)
bit
SDR
Address : 00002E
H
R/W : Readable and writable
X : Undefined value
444
7 6 5 4
D7 D6 D5 D4
R/W R/W R/W R/W
3 2 1 0
D3 D2 D1 D0
R/W R/W R/W R/W
Initial value
XXXXXXXX
B