參數(shù)資料
型號(hào): PCF51AC256BCPUE
廠商: Freescale Semiconductor
文件頁(yè)數(shù): 30/42頁(yè)
文件大?。?/td> 0K
描述: MCU 8BIT 256K FLASH 64-LQFP
標(biāo)準(zhǔn)包裝: 160
系列: MCF51AC
核心處理器: Coldfire V1
芯體尺寸: 32-位
速度: 50MHz
連通性: I²C,SCI,SPI
外圍設(shè)備: LVD,PWM,WDT
輸入/輸出數(shù): 54
程序存儲(chǔ)器容量: 256KB(256K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 20x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-LQFP
包裝: 托盤
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Electrical Characteristics
Freescale Semiconductor
36
2.12
SPI Characteristics
Table 20 and Figure 15 through Figure 18 describe the timing requirements for the SPI system.
Table 20. SPI Timing
No.
C
Function
Symbol
Min
Max
Unit
—D
Operating frequency
Master
Slave
fop
fBus/2048
0
fBus/2
fBus/4
Hz
1D
SPSCK period
Master
Slave
tSPSCK
2
4
2048
tcyc
2D
Enable lead time
Master
Slave
tLead
1
2
1
tSPSCK
tcyc
3D
Enable lag time
Master
Slave
tLag
1
2
1
tSPSCK
tcyc
4D
Clock (SPSCK) high or low time
Master
Slave
tWSPSCK
tcyc –30
tcyc – 30
1024 tcyc
ns
5D
Data setup time (inputs)
Master
Slave
tSU
15
ns
6D
Data hold time (inputs)
Master
Slave
tHI
0
25
ns
7
D
Slave access time
ta
—1
tcyc
8
D
Slave MISO disable time
tdis
—1
tcyc
9D
Data valid (after SPSCK edge)
Master
Slave
tv
25
ns
10
D
Data hold time (outputs)
Master
Slave
tHO
0
ns
11
D
Rise time
Input
Output
tRI
tRO
tcyc – 25
25
ns
12
D
Fall time
Input
Output
tFI
tFO
tcyc – 25
25
ns
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