UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 478
UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
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17.3 CONTROL REGISTERS
17.3.1 Clocked Serial Interface Mode Register (CSIM)
format is shown in Figure 17-2.
438
The CSIM is an 8-bit register that specifies the serial interface operating mode, serial clock, wake-up function, etc.
This register can be read or written to with an 8-bit manipulation instruction or bit manipulation instruction. The CSIM
RESET input clears the CSIM register to 00H.
CSIM
CTXE
7
CRXE
6
Figure 17-2 Clocked Serial Interface Mode Register (CSIM) Format
WUP
5
CHAPTER 17 CLOCKED SERIAL INTERFACE
4
0
MOD1
3
MOD0
2
MOD1
CRXE
CTXE
CLS1
WUP
CLS1
0
1
0
0
1
1
0
0
1
1
1
0
1
0
1
MOD0
CLS0
CLS0
Wake-Up Function Control
Interrupt request signal generated after every serial
transfer in each mode.
Interrupt request signal generated only when address
is received in SBI mode.
Receive Operations
Disabled
Enabled
Transmit Operations
Disabled
Enabled
0
0
0
1
0
1
0
1
0
Operating Mode Transfer Direction Pins Used
3-wire serial I/O
mode
3-wire serial I/O
mode
SBI mode
Setting prohibited
0FF82H
Serial Clock Specification
External clock
Address
Internal clock
Operating Mode Selection Bit
On Reset
00H
Master
Slave
MSB-first
LSB-first
MSB-first
R/W
R/W
TM3/2
f
f
CLK
CLK
/32
/8
SCK Pin
Input
Output
SB0, SCK
SO0, SI0,
SCK0
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