參數(shù)資料
型號: MC68HC05BD3P
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 31/112頁
文件大?。?/td> 864K
代理商: MC68HC05BD3P
MC68HC05BD3
MOTOROLA
2-5
PIN DESCRIPTION AND I/O PORTS
2
2.3.6
Port C and D Conguration Registers
Port C and Port D are shared with PWM, M-Bus and SSP. The conguration registers at $0A and
$0B are used to congure those I/O pins. They are default to zero after power-on reset. Setting
these bits will set the corresponding pins to the corresponding functions, except PC6 and PC7.
For example, setting SCL and SDA bits of register $0B will congure Port D pins 1 and 0 as M-Bus
pins, regardless of DDR1 and DDR0 settings.
PC7 and PC6 are shared with both PWM and SSP. When HTTL and VTTL in $000B are set, PC7
and PC6 are congured as HTTL and VTTL outputs respectively, regardless of the status of
PWM15 and PWM14 in $000A. That is, HTTL and VTTL settings override PWM15 and PWM14
settings.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Conguration Register 1
$000A PWM15 PWM14 PWM13 PWM12 PWM11 PWM10 PWM9 PWM8 0000 0000
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Conguration Register 2
$000B
HTTL
VTTL
SCL
SDA
0000 0000
Table 2-2 Conguration for PC6 and PC7
PWM15
HTTL
Result of PC7
PWM14
VTTL
Result of PC6
0
PC7
0
PC6
0
1
HTTL
0
1
VTTL
1
0
PWM15
1
0
PWM14
1
HTTL
1
VTTL
TPG
23
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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