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HT85F2270 Datasheet(PDF) 72 Page - Holtek Semiconductor Inc

Part # HT85F2270
Description  Standard 8051 8-Bit Flash MCU
PDF  226 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT85F2270 Datasheet(HTML) 72 Page - Holtek Semiconductor Inc

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Rev. 1.00
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Standard 8051 8-Bit Flash MCU
HT85F2260/HT85F2270/HT85F2280
WDTCR Register
SFR Address: 96h
Bit
7
6
5
4
3
2
1
0
Name
WE4
WE�
WE�
WE1
WE0
—
—
WDTCS
R/W
R/W
R/W
R/W
R/W
R/W
—
—
R/W
POR
0
1
0
1
0
—
—
0
Bit 7~3
WE4~WE0: WDT function software control
10101: Disable
01010: Enable - default
Other values: Reset MCU
Bit 2~1
Unimplemented, read as “0”
Bit 0
WDTCS: Watchdog clock (fWDT) select
0: LIRC or LXT
1: fSYS/16
Note that the WDTCR value will default to 01010000B after any reset resource which
means that the WDT will be enabled after any reset takes place. For more details
regarding the reset operation, refer to the Reset section.
IP0 Register
SFR Address: B8h
Bit
7
6
5
4
3
2
1
0
Name
—
WDTS
PT�
PS0
PT1
PX1
PT0
PX0
R/W
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
—
0
0
0
0
0
0
0
Bit 7
Unimplemented, read as “0”
Bit 6
WDTS: Watchdog timer reset indication flag
0: No Watchdog timer reset
1: Watchdog timer reset
Bit 5
PT2: Timer 2 Interrupt priority low
Described elsewhere
Bit 4
PS0: UART 0 Interrupt priority low
Described elsewhere
Bit 3
PT1: Timer 1 Interrupt priority low
Described elsewhere
Bit 2
PX1: External interrupt 1 priority low
Described elsewhere
Bit 1
PT0: Timer 0 Interrupt priority low
Described elsewhere
Bit 0
PX0: External interrupt 0 priority low
Described elsewhere



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