參數(shù)資料
型號: 8XC196LX
英文描述: 8XC196Lx - 8XC196Lx Supplement to 8X196Kx. 8X196Jx. 87C196CA User's Manual
中文描述: 8XC196Lx - 8XC196Lx補(bǔ)編8X196Kx。 8X196Jx。 87C196CA用戶手冊
文件頁數(shù): 37/136頁
文件大?。?/td> 659K
代理商: 8XC196LX
4-3
STANDARD AND PTS INTERRUPTS
4.2.1
Interrupt Mask Registers
Figures 4-1 and 4-2 illustrate the interrupt mask registers for the 8XC196L
x
microcontrollers.
INT_MASK
Address:
Reset State:
0008H
00H
The interrupt mask (INT_MASK) register enables or disables (masks) individual interrupt requests.
(The EI and DI instructions enable and disable servicing of all maskable interrupts.) INT_MASK is the
low byte of the processor status word (PSW). PUSHF or PUSHA saves the contents of this register
onto the stack and then clears this register. Interrupt calls cannot occur immediately following a push
instruction. POPF or POPA restores it.
7
0
LA
AD
EPA0
EPA1
EPA2
EPA3
EPA
x
7
0
LB
J1850RX
J1850TX
AD
EPA0
EPA1
EPA2
EPA3
EPA
x
7
0
LD
EPA0
EPA1
EPA2
EPA3
EPA
x
Bit
Number
Function
7:0
Setting a bit enables the corresponding interrupt.
Bit Mnemonic
Interrupt Description
J1850RX
J1850 Receive (LB only)
J1850TX
J1850 Transmit (LB only)
AD
A/D Conversion Complete (LA, LB)
EPA0
EPA Capture/Compare Channel 0
EPA1
EPA Capture/Compare Channel 1
EPA2
EPA Capture/Compare Channel 2
EPA3
EPA Capture/Compare Channel 3
EPAx
Shared EPA interrupt
EPA 6–9 capture/compare channel events, EPA 0–1 compare channel events
, EPA
0–3 and 8–9 capture/compare overruns, and timer overflows can generate this
multiplexed interrupt. The EPA mask and pending registers decode the EPA
x
interrupt.
Write the EPA mask registers to enable the interrupt sources; read the EPA pending
registers to determine which source caused the interrupt.
87C196LA, LB only.
Bits 6–7 are reserved on the 87C196LA, and bits 5–7 are reserved on the 83C196LD. For
compatibility with future devices, write zeros to these bits.
Figure 4-1. Interrupt Mask (INT_MASK) Register
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