
432
Chapter 13
3-Wire Serial Interface (CSIB)
User’s Manual U16702EE3V2UD00
The pins of the 3-wire serial interface (CSIB) function alternately as port pins. For how to select the
alternate function, refer to the descriptions of the registers in
Chapter 4
”Port Functions” on
page 105
.
Figure 13-1:
Block Diagram of 3-Wire Serial Interface
Remark:
n = 0, 1
Table 13-2:
List of 3-Wire Serial Interface Pins
Pin Name
Alternate-Function Pin
I/O
Function
SIB0
P40
Input
Serial receive data input (CSIB0)
SIB1
P97
Serial receive data input (CSIB1)
SOB0
P41
Output
Serial transmit data input (CSIB0)
SOB1
P98
Serial transmit data input (CSIB1)
SCKB0
P42
I/O
Serial clock I/O (CSIB0)
SCKB1
P99
Serial clock I/O (CSIB1)
Internal bus
CBnCTL2
CBnCTL0
CBnSTR
Controller
INTCBnR
SOBn
INTCBnT
CBnTX
SO latch
Phase
control
Shift register
CBnRX
CBnCTL1
Phase control
SIBn
TOP01 (n = 1)
f
BRG
(n = 0)
f
XX
/2
f
XX
/4
f
XX
/8
f
XX
/16
f
XX
/32
f
XX
/64
SCKBn
Selector
electronic components distributor