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): 153/156頁
文件大?。?/td> 1107K
代理商: MC68HC08LT8CFGE
Input/Output (I/O) Ports
MC68HC08LT8 Data Sheet, Rev. 1
96
Freescale Semiconductor
9.2 Port A
Port A is an 8-bit special function port that shares four of its port pins with the keyboard interrupt module
(KBI).
9.2.1 Port A Data Register (PTA)
The port A data register contains a data latch for each of the eight port A pins.
PTA[7:0] — Port A Data Bits
These read/write bits are software programmable. Data direction of each port A pin is under the control
of the corresponding bit in data direction register A. Reset has no effect on port A data.
KBI[3:0] — Keyboard Interrupt Channels 3 to 0
KBI[3:0] are pins used for the keyboard interrupt input. The corresponding input, KBI[3:0], can be
enabled in the keyboard interrupt enable register, KBIER. Port pins used as KBI input will override any
control from the port I/O logic. See Section 20. Keyboard Interrupt Module (KBI).
E
0
DDRE0
LCD
CONFIG2 ($001D)
LCDCR ($0051)
PEE
LCDE
PTE0/FP3
1
DDRE1
PTE1/FP4
2
DDRE2
PTE2/FP5
3
DDRE3
PTE3/FP6
4
DDRE4
PTE4/FP7
5
DDRE5
PTE5/FP8
6
DDRE6
PTE6/FP9
7
DDRE7
PTE7/FP10
1. Pins not available on 44-pin package.
Address:
$0000
Bit 7
6
54
32
1
Bit 0
Read:
PTA7
PTA6
PTA5
PTA4
PTA3
PTA2
PTA1
PTA0
Write:
Reset:
Unaffected by Reset
Alternative Function:
KBI3
KBI2
KBI1
KBI0
Figure 9-2. Port A Data Register (PTA)
Table 9-1. Port Control Register Bits Summary (Sheet 2 of 2)
Port
Bit
DDR
Module Control
Pin
Module
Register
Control Bit
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