Serial Data Register (Sdr) - Fujitsu MB90335 Series Hardware Manual

CHAPTER 17 EXTENDED I/O SERIAL INTERFACE
17.2 Register in Extended I/O Serial Interface
17.2.2

Serial Data Register (SDR)

The configuration and functions of Serial data register (SDR) are described.
■ Serial Data Register (SDR)
Figure 17.2-3 shows the bit configuration of the serial data register (SDR).
SDR bit
Address
: 00005A
H
R/W : Readable/Writable
X : Undefined value
The serial data register (SDR) is a serial data register to hold transfer data of the serial I/O.
Both writing and reading to and from SDR during transfer are disabled.
374
Figure 17.2-3 Bit Configuration of Serial Data Register (SDR)
5
7 6
D7
D6 D5
(R/W) (R/W) (R/W) (R/W) (R/W) (R/W) (R/W) (R/W)
FUJITSU MICROELECTRONICS LIMITED
4 3 2
1
D1
D4 D3 D2
MB90335 Series
0
Serial data register
D0
XXXXXXXX
Initial value
CM44-10137-6E
B