參數(shù)資料
型號: MC68HC08LT8CFGE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, ROHS COMPLIANT, MS-026BCB, LQFP-44
文件頁數(shù): 66/156頁
文件大?。?/td> 1107K
代理商: MC68HC08LT8CFGE
Pin Functions
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
17
1.5 Pin Functions
Description of the pin functions are provided in Table 1-1.
Table 1-1. Pin Functions
Pin Name
Pin Description
Input/Output
Voltage
Level
VDD
Power supply
Input
5 V or 3 V
VSS
Power supply ground
Output
0V
VLCD
LCD bias voltage
Input
VDD
RST
Reset input, active low; with internal pull up and Schmitt trigger
input
Input/output
VDD
IRQ
External IRQ pin; with programmable internal pull up and Schmitt
trigger input
Input
VDD
Used for monitor mode entry
Input
VDD to VTST
OSC1
Crystal input for 16-MHz system clock
Input
VDD
OSC2
Crystal oscillator output; inverted OSC1 signal
Output
VDD
XTAL1
Crystal input for 32.768-kHz for subsystem clock
Input
VDD
XTAL2
Crystal oscillator output; inverted XTAL1 signal
Output
VDD
BP0–BP2
LCD backplane drivers
Output
VDD
BP3/FP0
LCD backplane driver BP3 or frontplane driver FP0
Output
VDD
PTA0/KBI0
PTA1/KBI1
PTA2/KBI2
PTA3/KBI3
PTA4
PTA5
PTA6
PTA7
8-bit general-purpose I/O port
Input/output
VDD
PTA0–PTA3 as keyboard interrupts with pull-up device,
KBI0–KBI3
Input
VDD
PTB0/T2CH0
PTB1/T2CH1
PTB2/T1CH0/PPIECK
PTB3/T1CH1
PTB6/FP1
PTB7/FP2
8-bit general-purpose I/O port,
with high current sinks on PTB2–PTB3
Input/output
VDD
PTB0 as T2CH0 of TIM2
Input/output
VDD
PTB1 as T2CH1 of TIM2
Input/output
VDD
PTB2 as PPIECK; external clock source input for PPI
Input
VDD
PTB2 as T1CH0 of TIM1
Input/output
VDD
PTB3 as T1CH1 of TIM1
Input/output
VDD
PTB6–PTB7 as LCD frontplane drivers, FP1–FP2
Output
VDD
Continued on next page
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