Cmsemicon CMS32L051 - Slave Transmission

V1.2.2
CMS32L051 User Manual |Chapter 12 Universal Serial Communication Unit
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12.6.1 Slave transmission
Slave transmission refers to the operation of this product to send data to other devices in the state of
input transmission clock from other devices.
Slave Select Input function
SSPI00
Object channel
Channel 0 for SCI0
The pin used
SCLK00, SDO00, SS00
interrupt
INTSSPI00
You can select either a transmit-end interrupt (single-pass mode) or a buffer null interrupt
(continuous transfer mode).
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
Slave Select Input function
You can choose to run the slave selection function.
Note 1 Because the external serial clock of the SCLK00 pin input is used internally, the maximum transfer rate is
f
MCK
/6[Hz].
2. 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).
Note 1. f
MCK
: The operating clock frequency of the object channel
2.m: Unit number (m=0) n: Channel number (n=0).