參數(shù)資料
型號: MC68HC705PL4BCSD
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.56 MHz, MICROCONTROLLER, PDSO28
封裝: SSOP-28
文件頁數(shù): 42/98頁
文件大?。?/td> 1019K
代理商: MC68HC705PL4BCSD
April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
INPUT/OUTPUT PORTS
MOTOROLA
REV 2.0
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 ag 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 Specications 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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