參數(shù)資料
型號: MC68HC05L16CFU
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, PQFP80
封裝: PLASTIC, QFP-80
文件頁數(shù): 100/146頁
文件大?。?/td> 852K
代理商: MC68HC05L16CFU
Port E
MC68HC05L16 MC68HC705L16 Data Sheet, Rev. 4.1
Freescale Semiconductor
57
On reset, all port E outputs are disconnected from the pins and the port E data latches are set to logic 1.
If EWOMH bit or EWOML bit in the WOM1 register is set, the P-channel driver of output buffers at the
upper or lower four bits, respectively, are disabled (open-drain mode). These open-drain controls do not
apply to the pins which are configured as frontplane driver outputs.
6.6.1 Port E Data Register
Read
Anytime; returns output data latch
Write
Anytime (Writes do not change pin state when configured for LCD driver output.)
Reset
All bits set to logic 1 and output ports disconnected from the pins (LCD is enabled on reset.)
6.6.2 Port E MUX Register
Read
Anytime when OPTM = 1
Write
Anytime (Writes have no effect if PEH/PEL is set.)
Reset
All bits cleared (LCD is enabled.)
PEMx — Port E MUX Control Bit x
0 = Configure pin PEx to LCD
1 = Configure pin PEx to output
Address:
$0004
Bit 7
654321
Bit 0
Read:
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
Write:
Reset:
11111111
Figure 6-9. Port E Data Register (PORTE)
Address:
Option Map — $0004
Bit 7
654321
Bit 0
Read:
PEM7
PEM6
PEM5
PEM4
PEM3
PEM2
PEM1
PEM0
Write:
Reset:
00000000
Figure 6-10. Port E MUX Register (PEMUX)
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