10
10-42
MULTIJUNCTION TIMERS
10.2 Common Units of Multijunction Timers
32180 Group User’s Manual (Rev.1.0)
TOP8,9 Interrupt Request Mask & Status Register (TOP89IMS)
<Address: H
’0080 0233>9 1011121314b15b8
TOPIM8TOPIM9T
PIS
T
PIS
00 00
<After reset: H’00>
b Bit Name Function R W
0, 1 No function assigned. Fix to "0". 00
2 TOPIS9 (TOP9 interrupt request status bit) 0: Interrupt not requested R(Note 1)
3 TOPIS8 (TOP8 interrupt request status bit) 1: Interrupt requested
4, 5 No function assigned. Fix to "0". 00
6 TOPIM9 (TOP9 interrupt request mask bit) 0: Enable interrupt request R W
7 TOPIM8 (TOP8 interrupt request mask bit) 1: Mask (disable) interrupt request
Note 1: Only writing "0" is effective. Writing "1" has no effect; the bit retains the value it had before the write.
Note: • TOP10 has only one interrupt source in the interrupt group, so that its status and mask registers are nonexistent in the MJT
interrupt control registers. (They are controlled directly by the Interrupt Controller.)
b10
TOPIS9
F/F
TOPIM9
F/F
b14
b11
TOPIS8
F/F
TOPIM8
F/F
b15
TOP8,9 output interrupt request
IRQ6
(Level)
2-source inputs
TOP89IMS <H'0080 0233>
Data bus
TOP9udf
TOP8udf
Figure 10.2.7 Block Diagram of TOP8,9 Output Interrupt Request
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