參數(shù)資料
型號： M37754S4CHP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
中文描述： 單芯片16位微機(jī)的CMOS
文件頁數(shù)： 21/114頁
文件大小： 1116K
代理商： M37754S4CHP
21
MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Fig. 14 Processor mode register 0 bit configuration
Notes 1:
Bits 2, 3, and 4 can be re-write after bit 5 (expansion function select bit) is set to “1.”
2:
After bit 5 is set to “1” once, bit 5 cannot be cleared to “0” except external reset and software reset.
3:
Bits 6 and 7 are write-only bits and undefined at read. Do not use SEB or CLB insturuction when setting bits 0–7.
Transmit clock output pin select bit
00 : Normal mode (output only to CLK
0
)
01 : Plural clocks specified; output to CLK
0
10 : Plural clocks specified; output to CLKS
0
11 : Plural clocks specified; output to CLKS
1
Internal clock stop select bit at WIT
(Note 1)
0 : Clock for peripheral function and watchdog timer are operating at WIT
1 : Internal clock except that for oscillation circuit and watchdog timer are stopped at WIT
7
6
5
4
3
2
1
0
Particular function select register 1 (6D
16
)
Watchdog timer’s clock select bit
(Note 1)
0 : Exclusive clock deviding circuit output (Wf
512
, Wf
32
) is used as clock for watchdog
timer. Clock (Wf
512
, Wf
32
) for watchdog timer does not change in hold.
1 : Clock for peripheral device deviding circuit output (Pf
512
, Pf
32
) is used as clock for
watchdog timer. Clock (Pf
512
, Pf
32
) for watchdog timer changes in hold.
Watchdog timer exclusive clock dividing circuit is stopped.
Signal output stop select bit
(Note 1)
Refer to Table 8.
Expansion function select bit
(Note 2)
Refer to Figure 62.
Pull-up select bit 0
(Note 3)
0 : With no pull-up for P5
7
, P5
6
, P5
5
, P5
4
1 : With pull-up for P5
7
, P5
6
, P5
5
, P5
4
Pull-up select bit 1
(Note 3)
0 : With no pull-up for P9
5
1 : With pull-up for P9
5
TC
1
TC
0
Fig. 15 Processor mode register 0 bit configuration
Note
: When selecting low-speed running, set bit 2 to “0.”
Processor mode bits
00 : Single-chip mode
01 : Memory expansion mode
10 : Microprocessor mode
11 : Do not select.
Internal memory access bus cycle select bit
(Note)
Internal memory access condition in high-speed running
0 : 2-
φ
access for internal RAM, 3-
φ
access for internal ROM and SFR
1 : 2-
φ
access for internal RAM, internal ROM, SFR
Software reset bit
The microcomputer is reset when this bit is set to “1”.
Interrupt priority detection time select bit
0 0 : Select 0 in Figure 13
0 1 : Select 1 in Figure 13
1 0 : Select 2 in Figure 13
Test mode bit
This bit must be “0.”
Clock
φ
1
output select bit
0 : No
φ
1
output
1 :
φ
1
output
7
6
0
5
4
3
2
1
0
Processor mode register 0 (5E
16
)
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