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參數資料
型號: W77E058A
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數: 17/87頁
文件大小: 594K
代理商: W77E058A
W77E058A
Publication Release Date: April 17, 2007
- 17 -
Revision A10
Port 1
Bit:
7
6
5
4
3
2
1
0
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
Mnemonic: P1
Address: 90h
P1.7-0: General purpose I/O port. Most instructions will read the port pins in case of a port read
access, however in case of read-modify-write instructions, the port latch is read. Some pins
also have alternate input or output functions. This alternate functions are described below:
P1.0 : T2
P1.1 : T2EX
P1.2 : RXD1
P1.3 : TXD1
P1.4 : INT2
P1.5 :
INT3
P1.6 : INT4
P1.7 :
INT5
External I/O for Timer/Counter 2
Timer/Counter 2 Capture/Reload Trigger
Serial Port 1 Receive
Serial Port 1 Transmit
External Interrupt 2
External Interrupt 3
External Interrupt 4
External Interrupt 5
External Iinterrupt Flag
Bit:
7
6
5
4
3
2
1
0
IE5
IE4
IE3
IE2
XT/
RG
RGMD
RGSL
-
Mnemonic: EXIF
Address: 91h
IE5: External Interrupt 5 flag. Set by hardware when a falling edge is detected on
INT5
.
IE4: External Interrupt 4 flag. Set by hardware when a rising edge is detected on INT4.
IE3: External Interrupt 3 flag. Set by hardware when a falling edge is detected on
INT3
.
IE2: External Interrupt 2 flag. Set by hardware when a rising edge is detected on INT2.
XT/
RG
: Crystal/RC Oscillator Select. Setting this bit selects crystal or external clock as system clock
source. Clearing this bit selects the on-chip RC oscillator as clock source. XTUP(STATUS.4)
must be set to 1 and XTOFF (PMR.3) must be cleared before this bit can be set. Attempts to
set this bit without obeying these conditions will be ignored. This bit is set to 1 after a power-
on reset and unchanged by other forms of reset.
RGMD: RC Mode Status. This bit indicates the current clock source of microcontroller. When cleared,
CPU is operating from the external crystal or oscillator. When set, CPU is operating from the
on-chip RC oscillator. This bit is cleared to 0 after a power-on reset and unchanged by other
forms of reset.
RGSL: RC Oscillator Select. This bit selects the clock source following a resume from Power Down
Mode. Setting this bit allows device operating from RC oscillator when a resume from Power
Down Mode. When this bit is cleared, the device will hold operation until the crystal oscillator
has warmed-up following a resume from Power Down Mode. This bit is cleared to 0 after a
power-on reset and unchanged by other forms of reset.
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