參數(shù)資料
型號(hào): W78L058A
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(yè)數(shù): 8/34頁(yè)
文件大?。?/td> 238K
代理商: W78L058A
W78LE58/W78L058A
- 8 -
Mode 3: P4.0
P4.3 are read/write strobe signals that are synchronized with
RD
or
WR
signal at
specified addresses. These signals can be used as chip-select signals for external
peripherals.
When Port 4 is configured with the feature of chip-select signals, the chip-select signal address range
depends on the contents of the SFR P4xAH, P4xAL, P4CONA and P4CONB. The registers P4xAH
and P4xAL contain the 16-bit base address of P4.x. The registers P4CONA and P4CONB contain the
control bits to configure the Port 4 operation mode.
INT2
/
INT3
Two additional external interrupts,
INT2
and
INT3
, whose functions are similar to those of external
interrupt 0 and 1 in the standard 80C52. The functions/status of these interrupts are
determined/shown by the bits in the XICON (External Interrupt Control) register. The XICON register is
bit-addressable but is not a standard register in the standard 80C52. Its address is at 0C0H. To
set/clear bits in the XICON register, one can use the "SETB (
CLR
) bit" instruction. For example,
"SETB 0C2H" sets the EX2 bit of XICON.
XICON - external interrupt control (C0H)
PX3
PX3: External interrupt 3 priority high if set
EX3: External interrupt 3 enable if set
IE3: If IT3 = 1, IE3 is set/cleared automatically by hardware when interrupt is detected/serviced
IT3: External interrupt 3 is falling-edge/low-level triggered when this bit is set/cleared by software
PX2: External interrupt 2 priority high if set
EX2: External interrupt 2 enable if set
IE2: If IT2 = 1, IE2 is set/cleared automatically by hardware when interrupt is detected/serviced
IT2: External interrupt 2 is falling-edge/low-level triggered when this bit is set/cleared by software
Eight-source interrupt information:
EX3
IE3
IT3
PX2
EX2
IE2
IT2
INTERRUPT
SOURCE
VECTOR
ADDRESS
POLLING
SEQUENCE WITHIN
PRIORITY LEVEL
0 (highest)
1
2
3
4
5
6
7 (lowest)
ENABLE
REQUIRED
SETTINGS
IE.0
IE.1
IE.2
IE.3
IE.4
IE.5
XICON.2
XICON.6
INTERRUPT TYPE
EDGE/LEVEL
External Interrupt 0
Timer/Counter 0
External Interrupt 1
Timer/Counter 1
Serial Port
Timer/Counter 2
External Interrupt 2
External Interrupt 3
03H
0BH
13H
1BH
23H
2BH
33H
3BH
TCON.0
-
TCON.2
-
-
-
XICON.0
XICON.3
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