ST7232AK1 STMicroelectronics, ST7232AK1 Datasheet - Page 136

• Manufacturer Part Number: ST7232AK1
• Description: 8-BIT MCU WITH 8K FLASH/ROM, ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST7232AK1

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST7232A
COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
Figure 77. SPI Slave Timing Diagram with CPHA=1
Figure 78. 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.
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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)
t
see note 2
dis(SO)
note 2
see