Toshiba TLCS-900/L1 Series Manual page 174

3.10.7 Clocked Synchronous 8-Bit SIO Mode Control
The following registers are used to control and monitor the operation status when the
serial bus interface (SBI) is being operated in clocked synchronous 8-bit SIO mode.
7
SBI0CR1
Bit symbol SIOS
(0240H)
Read/Write
After reset 0
Prohibit
Function
Transfer start
read-
0: Stop
modify-
write
1: Start
Note: Set the tranfer mode and the serial clock after setting <SIOS> to 0 and <SIOINH> to 1.
SBI0DBR
7
(0241H)
Bit symbol DB7
Prohibit
Read/Write
read-
modify-
After reset
write
Serial Bus Interface Control Register 1
6 5 4
SIOINH SIOM1 SIOM0
W
0 0 0
Continue/ Transfer mode select
abort transfer 00: Transmit mode
0: Continue 01: (Reserved)
transfer 10: Transmit/receive mode
1: Abort 11: Receive mode
transfer
Serial clock selection <SCK2:0> at write
000
001
010
011
100
101
110
111
Transfer mode selection
00 8-bit transmit mode
01 (Reserved)
10 8-bit transmit/received mode
11 8-bit received mode
Continue/abort transfer
0
1
Transfer start/stop
0
1
Serial Bus Interface Data Buffer Register
6 5 4
DB6 DB5 DB4
R (Receiver)/W (Transfer)
Undefined
Figure 3.10.20 Register for the SIO Mode
91C824-172
3 2
SCK2 SCK1
W
0
Serial clock selection and reset monitor
n = 4
2.1 MHz
n = 5
1031.3 kHz
System clock: fc
n = 6
515.6 kHz
Clock gear: fc/1
n = 7
257.8 kHz
fc = 33 MHz
n = 8
128.9 kHz
(Output to SCK pin)
n = 9
64.5 kHz
fscl =
n = 10
32.2 kHz
−
External mode
(Input from SCK terminal)
Continue transfer
Abort transfer (Automatically cleared after transfer
aborted)
Stopped
Started
3 2 1
DB3 DB2 DB1
TMP91C824
1 0
SCK0
W
0 0
fc
[Hz]
n
2
0
DB0
2008-02-20