Fujitsu FR81S 사용자 설명서
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
78
4.3.11.
Transfer Byte Register: TBYTE3-0
The transfer byte register (TBYTE) is used to indicate the transfer data count when each serial chip select
pin is active.
TBYTE3n-0n(n=0 to 11) : Address Base addr + 18
H
(Access: Byte, Half-word,
Word)
15
14
13
12
11
10
9
8
bit
TBYTE3[7:0]
0
0
0
0
0
0
0
0
Initial value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
7
6
5
4
3
2
1
0
bit
TBYTE2[7:0]
0
0
0
0
0
0
0
0
Initial value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
15
14
13
12
11
10
9
8
bit
TBYTE1[7:0]
0
0
0
0
0
0
0
0
Initial value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
7
6
5
4
3
2
1
0
bit
TBYTE0[7:0]
0
0
0
0
0
0
0
0
Initial value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
[bit15 to bit8, bit7 to bit0] TBYTE: Transfer data count display bits
The transfer byte register allows you to set transfer data count when each serial chip select pin is active.
After a serial chip select pin has become active, the serial chip select pin will become inactive when transfer
of data count set to these bits has completed.
The serial chip select pin 0 (SCS0) corresponds to TBYTE0, the serial chip select pin 1 (SCS1) to TBYTE1,
the serial chip select pin 2 (SCS2) to TBYTE2, and the serial chip select pin 3 (SCS3) to TBYTE3.
If one of the following conditions is satisfied, the transfer byte register (TBYTE) is used for synchronous
transmission or external trigger transmission. When transmission operation is started with synchronous
transmission or external trigger transmission, data count set to TBYTE will be transferred.
⋅
Serial chip select is disabled (SCSCR:CSEN3-0="0000"b)
If the value of these bits is changed during transmission operation (SSR:TBI=0), the changed transfer
data count setting will take effect after the operation of transmitting transfer data count set before the
change has completed.
TBYTE
Transfer byte register
Write
Writing to TBYTE
Read
Setting value of TBYTE
MB91520 Series
MN705-00010-1v0-E
1391