tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 26

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(1) Interrupt latches (IL15 to 2)
is set to “1” when an interrupt request is generated, and requests the CPU to accept the
interrupt. The latch is cleared to “0” just after the interrupt is accepted. All interrupt
latches are initialized to “0” during reset.
can be cleared to “0” individually by an instruction; however, the read-modify-write
instruction such as bit manipulation or operation instructions cannot be used. Thus,
interrupt requests can be canceled and initialized by the program. Note that interrupt
latches cannot be set to “1” by any instruction.
interrupt requests by software is possible.
Interrupt latches are provided for each source, except for a software interrupt. The latch
Interrupt latches are assigned to addresses 003CH and 003DH in the SFR. Each latch
The contents of interrupt latches can be read out by an instruction. Therefore, testing
Example 1: Clears interrupt latches
Example 2: Reads interrupt latches
Example 3: Tests an interrupt latch
LDW
LD
TEST
JR
88CU74-26
(ILL), 1110100000111111B
WA, (ILL)
(IL).7
F, SSET
;
;
;
IL12, IL10 to IL6 ← 0
W ← ILH, A ← ILL
if IL7 = 1 then jump
TMP88CU74
2007-10-19
2003-02-17