參數(shù)資料
型號(hào)： M37736EHBXXXGP
廠商： Mitsubishi Electric Corporation
英文描述： PROM VERSION OF M37736MHBXXXGP(MICROCOMPUTERS)
中文描述： PROM的版本M37736MHBXXXGP（微型）
文件頁(yè)數(shù)： 14/96頁(yè)
文件大?。?/td> 1328K
代理商： M37736EHBXXXGP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
MITSUBISHI MICROCOMPUTERS
M37736MHBXXXGP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
14
Interrupt priority detection time selection bits
Bit 5
0
0
1
Bit 4
0
1
0
7 cycles of
4 cycles of
2 cycles of
Fig. 10 Processor mode register 0 configuration
Fig. 9 Interrupt priority detection time
As shown in Figure 9, there are three different interrupt priority
detection time from which one is selected by software. After the
selected time has elapsed, the interrupt which has the highest priority
is determined and is processed after the current instruction execution
has been completed.
The time is selected with bits 4 and 5 of the processor mode register
0 (address 5E
16
) shown in Figure 10. Table 4 shows the relationship
between these bits and the number of cycles. After a reset, the
processor mode register 0 is initialized to “00
16
”. Therefore, the longest
time is selected. However, the shortest time should be selected by
software.
Table 3. Value set in processor interrupt level (IPL) during an interrupt
Interrupt types
DBC
Watchdog timer
Zero divide
BRK instruction
Table 4. Relationship between interrupt priority detection time selec-
tion bits and number of cycles
: internal clock
Number of cycles
7
Processor mode register 0 (5E
16
)
6
5
4
3
2
1
0
Address
Processor mode bits
0 0 : Single-chip mode
0 1 : Memory expansion mode
1 0 : Microprocessor mode
Wait bit
0 : Wait
1 : No wait
Software reset bit
The processor is reset when this bit is set to “1”
.
Interrupt priority detection time selection bits
0 0 : Select 0 in Figure 9
0 1 : Select 1 in Figure 9
1 0 : Select 2 in Figure 9
Always “0”
Clock
0 : No
1 :
1
output selection bit
1
output
1
output
0
0
1
2
Internal clock
Operation code fetch cycle
Sampling pulse
Priority detection time
Select one from 0 to 2 with
bits 4 and 5 of the
processor
mode register 0
Setting value
0
7
7
Not change value of IPL.
Not change value of IPL.
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