参数资料
型号: ST72141K2B3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, PLASTIC, SDIP-32
文件页数: 28/133页
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
123/133
MEMORY AND PERIPHERAL CHARACTERISTICS (Cont’d)
Figure 65. SPI Master Timing Diagram CPHA=0, CPOL=0 2)
Notes:
1) Data based on characterization results, not tested in production.
2) Measurement points are VOL, VOH, VIL and VIH in the SPI timing diagram
SPI Serial Peripheral Interface
Ref.
Symbol
Parameter
Condition
Value 1)
Unit
Min
Max
fSPI
SPI frequency
Master
Slave
1/128
dc
1/4
1/2
fCPU
1tSPI
SPI clock period
Master
Slave
4
2
tCPU
2tLead
Enable lead time
Slave
120
ns
3tLag
Enable lag time
Slave
120
ns
4tSPI_H
Clock (SCK) high time
Master
Slave
100
90
ns
5tSPI_L
Clock (SCK) low time
Master
Slave
100
90
ns
6tSU
Data set-up time
Master
Slave
100
ns
7tH
Data hold time (inputs)
Master
Slave
100
ns
8tA
Access time (time to data active
from high impedance state)
Slave
0
120
ns
9tDis
Disable time (hold time to high im-
pedance state)
240
ns
10
tV
Data valid
Master (before capture edge)
Slave (after enable edge)
0.25
120
tCPU
ns
11
tHold
Data hold time (outputs)
Master (before capture edge)
Slave (after enable edge)
0.25
0
tCPU
ns
12
tRise
Rise time
(20% VDD to 70% VDD, CL = 200pF)
Outputs: SCK,MOSI,MISO
Inputs: SCK,MOSI,MISO,SS
100
ns
μs
13
tFall
Fall time
(70% VDD to 20% VDD, CL = 200pF)
Outputs: SCK,MOSI,MISO
Inputs: SCK,MOSI,MISO,SS
100
ns
μs
1
6
7
10
11
12
13
SS
(INPUT)
SCK
(OUTPUT)
MISO
MOSI
(INPUT)
(OUTPUT)
4
5
D7-OUT
D6-OUT
D0-OUT
D7-IN
D6-IN
D0-IN
VR000109
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