参数资料
型号: MC16S2CPU20B1
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, 20.97 MHz, MICROCONTROLLER, PQFP100
封装: TQFP-100
文件页数: 72/104页
文件大小: 812K
代理商: MC16S2CPU20B1
MC68HC16S2
MOTOROLA
MC68HC16S2TS/D
7
2 Signal Descriptions
2.1 Pin Characteristics
Table 2 shows MCU pins and their characteristics. All inputs detect CMOS logic levels. All inputs can
be put in a high impedance state, but the method of doing this differs depending upon pin function. Refer
to Table 4 for a description of output drivers. An entry in the discrete I/O column of the MCU pin char-
acteristics table indicates that a pin has an alternate I/O function. The port designation is given when it
applies. Refer to the MCU block diagram for information about port organization.
NOTES:
1. HALT and BERR synchronized only if late HALT or BERR.
2. DATA[15:0] are synchronized during reset only. MODCLK is synchronized only when used as a port I/O pin.
Table 2 MCU Pin Characteristics
Pin Mnemonic
Output
Driver
Input
Synchronized
Input
Hysteresis
Discrete
I/O
Port
Designation
ADDR23/CS10/ECLK
A
Yes
No
ADDR[22:19]/CS[9:6]
A
Yes
No
O
PC[6:3]
ADDR[18:0]
A
Yes
No
AS
B
Yes
No
I/O
PE5
AVEC
B
Yes
No
I/O
PE2
BERR
B
Yes1
No
BG/CS1
B
————
BGACK/CS2
B
Yes
No
BKPT/DSCLK
Yes
BR/CS0
B
Yes
No
CLKOUT
A
————
CSBOOT
B
————
DATA[15:0]
Aw
Yes2
No
DS
B
Yes
No
I/O
PE4
DSACK[1:0]
B
Yes
No
I/O
PE[1:0]
EXTAL
Yes
FC[2:0]/CS[5:3]
A
Yes
No
O
PC[2:0]
FREEZE/QUOT
A
————
HALT
Bo
Yes1
No
IPIPE0/DSO
A
————
IPIPE1/DSI
A
Yes
IRQ[7:1]
B
Yes
I/O
PF[7:1]
MODCLK2
B
Yes
No
I/O
PF0
R/W
A
Yes
No
RESET
Bo
Yes
PE3
B
Yes
I/O
PE3
SIZ[1:0]
B
Yes
No
I/O
PE[7:6]
TSC
Yes
XFC
————
XTAL
————
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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