st72324bk STMicroelectronics, st72324bk Datasheet - Page 139

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

ST72323 ST72323L
11.11
11.11.1
Communication interface characteristics
SPI - serial peripheral interface
Subject to general operating conditions for V
Data based on design simulation and/or characterization results, not tested in production.
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 on the I/O port configuration. Refer to I/O port characteristics for more
details on the input/output alternate function characteristics (SS, SCK, MOSI, MISO).
Table 83.
1. Depends on f
1/t
Symbol
t
t
w(SCKH)
t
w(SCKL)
t
t
t
t
t
t
t
t
dis(SO)
t
t
t
r(SCK)
su(SS)
t
f(SCK)
f
su(MI)
t
v(MO)
h(MO)
su(SI)
a(SO)
v(SO)
h(SO)
h(SS)
h(MI)
c(SCK)
h(SI)
SCK
SPI characteristics
CPU
SPI clock frequency
SPI clock rise and fall time
SS setup time
SS hold time
SCK high and low time
Data input setup time
Data input hold time
Data output access time
Data output disable time
Data output valid time
Data output hold time
Data output valid time
Data output hold time
. For example, if f
Parameter
CPU
= 8 MHz, then t
DD
Master
f
Slave
f
Slave
Slave
Master
Slave
Master
Slave
Master
Slave
Slave
Slave
Slave (after
enable edge)
Master (before
capture edge)
CPU
CPU
CPU
, f
Conditions
CPU
= 8 MHz
= 8 MHz
= 1 / f
, and T
CPU
= 125 ns and t
A
unless otherwise specified.
t
CPU
f
CPU
see I/O port pin description
0.0625
Electrical characteristics
Min
120
100
100
100
100
100
90
+ 50
0
0
0
0
/128
su(SS)
(1)
= 175 ns.
f
f
CPU
CPU
Max
120
240
120
90
2
4
/4
/2
139/167
Unit
MHz
ns