st72321j STMicroelectronics, st72321j Datasheet - Page 161

• Manufacturer Part Number: st72321j
• Description: 8-bit Mcu With Nested Interrupts, Flash, 10-bit Adc, 5 Timers, Spi, Sci, I2c Interface
• Manufacturer: STMicroelectronics

COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
Figure 98. SPI Slave Timing Diagram with CPHA=1
Figure 99. SPI Master Timing Diagram
Notes:
1. Measurement points are done at CMOS levels: 0.3xV
2. When no communication is on-going the data output line of the SPI (MOSI in master mode, MISO in slave mode) has
its alternate function capability released. In this case, the pin status depends of the I/O port configuration.
MISO
MOSI
MISO
MOSI
SS
CPHA=1
CPOL=0
CPHA=1
CPOL=1
OUTPUT
INPUT
SS
INPUT
CPHA=0
CPOL=0
CPHA=0
CPOL=1
CPHA=1
CPOL=0
CPHA=1
CPOL=1
INPUT
OUTPUT
INPUT
see
note 2
see note 2
t
a(SO)
t
su(SS)
HZ
t
t
t
v(MO)
w(SCKH)
w(SCKL)
t
su(MI)
t
su(SI)
MSB OUT
MSB IN
MSB OUT
t
h(MO)
t
MSB IN
h(MI)
1)
t
h(SI)
t
c(SCK)
t
c(SCK)
t
t
t
v(SO)
w(SCKH)
w(SCKL)
DD
and 0.7xV
BIT6 OUT
1)
BIT6 OUT
BIT6 IN
DD
.
BIT1 IN
t
h(SO)
t
t
t
t
r(SCK)
f(SCK)
r(SCK)
f(SCK)
LSB OUT
LSB IN
LSB OUT
LSB IN
t
h(SS)
ST72321J
t
see note 2
dis(SO)
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note 2
see