Cmsemicon CMS32L051 - Slave Receiving

V1.2.2
CMS32L051 User Manual |Chapter 12 Universal Serial Communication Unit
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12.5.5 Slave receiving
Slave reception refers to the operation of this product to receive data from other devices in the state of
transmitting clocks from other devices.
3-wire serial
I/O
SSPI00
SSPI01
SSPI10
SSPI11
SSPI20
SSPI21
Object channel
SCI0
Channel 0
SCI0
Channel 1
SCI0
Channel 2
SCI0
Channel 3
SCI1
Channel 0
SCI1
Channel 1
The pin used
SCLK00,
SDI00
SCLK01,
SDI01
SCLK10,
SDI10
SCLK11,
SDI11
SCLK20,
SDI20
SCLK21,
SDI21
interrupt
INTSSPI00
INTSSPI01
INTSSPI10
INTSSPI11
INTSSPI20
INTSSPI21
Limited to end-of-transfer interrupts (disable setting buffer null interrupts).
Error detection
flag
Only the Overflow Error Detection Flag (OVFmn).
The length of the
transmitted data
7 or 8 bits
Transfer rate
Max.f
MCK
/6[Hz]
Note1, 2
Data phase
It can be selected via the DAPmn bit of the SCRmn register.
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Clock phase
It can be selected via the CKPmn bit of the SCRmn register.
 CKPmn=0: Normal
 CKPmn=1: Inverted
Data direction
MSB first or LSB first
Note 1. The maximum transfer rate is f
MCK
/6 [Hz] because the external serial clocks input from pins SCLK00, SCLK01,
SCLK10, SCLK11, SCLK20, and SCLK21 are sampled internally and then used.
2. It must be used within the scope of the peripheral functional characteristics that meet this condition and meet the
electrical characteristics (refer to the data sheet).
Remark 1. f
MCK
: The operating clock frequency of the object channel
2.m: Unit number (m=0, 1) n: channel number (n=0~3)mn=00~03 , 10~11.