M37754FFCGP Datasheet, PDF (14/68 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION

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MITSUBISHI MICROCOMPUTERS
M37754FFCGP
M37754FFCHP
SHINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
76 5432 1 0
0
Address
Particular function select register 0 6C16
Fix to “0”
External clock input select bit (Notes 1, 2)
0 : Actuated oscillation circuit; connecting resonator
1 : Stopped oscillation circuit; inputting externaly genarated clock
Memory allocation select bits 2, 1, 0 (Note 2)
0 0 0 : ROM 120 Kbytes, RAM 3968 bytes
(ROM : 00100016 to 1EFFFF16, RAM : 00008016 to 000FFF16)
0 0 1 : ROM 92 Kbytes, RAM 3968 bytes
(ROM:00800016 to 01EFFF16, RAM:00008016 to 000FFF16)
0 1 0 : ROM 60 Kbytes, RAM 3072 bytes
(ROM : 00100016 to 00FFFF16, RAM : 00008016 to 000C7F16)
0 1 1 : ROM 56 Kbytes, RAM 3072 bytes
(ROM:00200016 to 00FFFF16, RAM:00008016 to 000C7F16)
1 0 0 : ROM 48 Kbytes, RAM 2048 bytes
(ROM : 00400016 to 00FFFF16, RAM : 00008016 to 00087F16)
1 0 1 : ROM 32 Kbytes, RAM 2048 bytes
(ROM:00800016 to 00FFFF16, RAM:00008016 to 00087F16)
1 1 0 : ROM 60 Kbytes, RAM 2048 bytes
(ROM : 00100016 to 00FFFF16, RAM : 00008016 to 00087F16)
1 1 1 : ROM 56 Kbytes, RAM 2048 bytes
(ROM:00200016 to 00FFFF16, RAM:00008016 to 00087F16)
Standby state select bit 0 (Notes 1, 3)
; when WIT or STP instruction is executed in memory expansion
or microprocessor mode
0 : Pins P0 to P3, P10, and P11 are for external data bus.
1 : Pins P0 to P3, P10, and P11 are for port output or port input.
Standby state select bit 1 (Notes 1, 4)
; in execution of WIT or STP instruction
0 : “H” or “L” output for pins E/RD, WR
1 : “H” output for pins E/RD, WR
STP return select bit
0 : Watchdog timer is used when returning from Stop mode
1 : Watchdog timer is not used when returning from Stop mode ; the microcomputer returns at once.
Notes 1 : After the expansion function select bit (bit 5 of particular function select register 1; Figure 62) is “1”,
bits 1, 5 and 6 can be rewritten.
2 : To set bits 1 to 4, continuous-twice-write operation must be performed to address 6C16.
3 : When BYTE = “H” (8-bit external bus width), P11 becomes an input/output port independent of bit 5’s contents.
4 : When the signal output disable select bit is “1” and bit 5 is “1”, the E/RD pin always outputs “L” independent of bit 6’s contents
in execution of WIT or STP instruction.
Fig. 5 Particular function select register 0 bit configuration
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