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參數(shù)資料
| 型號(hào)： | 68HC705PL4B |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁(yè)數(shù)： | 47/98頁(yè) |
| 文件大?。?/td> | 1019K |
| 代理商： | 68HC705PL4B |
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April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
INPUT/OUTPUT PORTS
MOTOROLA
7-3
7.3
PORT B
Port B is an 8-bit bidirectional port, with pins PB0-PB3 shared with keyboard inter-
rupt functions. The Port B Data Register is at address $0001 and the Data Direc-
tion Register is at address $0006.
Pins PB0 to PB3 keyboard interrupt functions have individual enable and flag bits
in registers $000B and $000C.
7.4
PORT C
Port C is an 8-bit bidirectional port. The Port C Data Register is at address $0002
and the Data Direction Register is at address $0007. Port pins PC0 to PC3 are
high current sink pins; see Electrical Specifications section for values.
7.5
SUMMARY OF PORT A AND PORT B SHARED PINS
Table 7-2
below shows a summary of port pins shared with other on-chip mod-
ules.
Table 7-2. Port A and Port B Shared Pins
Port
Port Pin
Control
Pin Name
Shared Functions
Port A
PA0
—
PA0 or OSC2
PA0 on MC68HC05PL4
OSC2 on MC68HC05PL4B
PA1
DACEN
PA1/DTMF
DAC DTMF Output
PA2
TCAPEN
PA2/TCAP
16-bit Timer Input Capture
PA3
TCMPEN
PA3/TCMP
16-bit Timer Output Compare
Port B
PB3-PB0
KBIE3-KBIE0
PUL3-PUL0
PB3/KBI3-PB0/KBI0
Keyboard Interrupt
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