M37733MHBXXXFP Datasheet, PDF (45/89 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

PRELIMINARY _{NSootimcee: pTahriasmisentroict} ^{alimfinitsalasrpeescuifbicjeactitotno. change.}
RESET CIRCUIT
The microcomputer is released from the reset state when the RESET
pin is returned to “H” level after holding it at “L” level with the power
source voltage at 5 V ± 10%. Program execution starts at the address
formed by setting address A23 – A16 to 0016, A15 – A8 to the contents
of address FFFF16, and A7 – A0 to the contents of address FFFE16.
Figure 53 shows the status of the internal registers during reset.
MITSUBISHI MICROCOMPUTERS
M37733MHBXXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Port P0 direction register
Address
(0416)•••
0016
Port P1 direction register
(0516)•••
0016
Port P2 direction register
(0816)•••
0016
Port P3 direction register
Port P4 direction register
(0916)•••
(0C16)•••
00 00
0016
Port P5 direction register
(0D16)•••
0016
Port P6 direction register
(1016)•••
0016
Port P7 direction register
(1116)•••
0016
Port P8 direction register
(1416)•••
0016
A-D control register 0
(1E16)••• 0 0 0 0 0 ? ? ?
A-D control register 1
(1F16)•••
UART 0 Transmit/Receive mode register (3016)•••
00 0 11
0016
UART 1 Transmit/Receive mode register (3816)•••
0016
UART 0 transmit/receive
control register 0
UART 1 transmit/receive
control register 0
UART 0 transmit/receive
control register 1
UART 1 transmit/receive
control register 1
Count start flag
(3416)••• 0 0 0 0 1 0 0 0
(3C16)••• 0 0 0 0 1 0 0 0
(3516)••• 0 0 0 0 0 0 1 0
(3D16)••• 0 0 0 0 0 0 1 0
(4016)•••
0016
One- shot start flag
(4216)•••
0000 0
Up-down flag
(4416)•••
0016
Timer A0 mode register
(5616)•••
0016
Timer A1 mode register
(5716)•••
0016
Timer A2 mode register
Timer A3 mode register
(5816)•••
(5916)•••
0016
0016
Timer A4 mode register
(5A16)•••
0016
Timer B0 mode register
(5B16)••• 0 0 1 0 0 0 0 0
Timer B1 mode register
(5C16)••• 0 0 1 0 0 0 0
Timer B2 mode register
Processor mode register 0
Processor mode register 1
(5D16)••• 0 0 1 0 0 0 0
(5E16)•••
0016
(5F16)•••
0
Watchdog timer register
(6016)•••
FFF16
Fig. 53 Microcomputer internal status during reset
Address
Watchdog timer frequency selection flag (6116)•••
0
Memory allocation control
(6316)••• 0 0 0 0 0 0 0 01
UART2 transmit/receive mode register
(6416)••• 0 0 0 0 0 0 0
UART2 transmit/receive control register 0 (6816)•••
1000
UART2 transmit/receive control register 1 (6916)••• 0 0 0 0 0 0 1 0
Oscillation circuit control register 0 (6C16)••• 0 0 0 0 0 0 0 1
Port function control register
(6D16)••• 0
0016
Serial transmit control register
(6E16)•••
00
Oscillation circuit control register 1 (6F16)••• 0
000 00
A-D/UART2 trans./rece. interrupt control register (7016)•••
00 00
UART 0 transmission interrupt control register (7116)•••
00 00
UART 0 receive interrupt control register (7216)•••
00 00
UART 1 transmission interrupt control register (7316)•••
00 00
UART 1 receive interrupt control register (7416)•••
00 00
Timer A0 interrupt control register
(7516)•••
00 00
Timer A1 interrupt control register
(7616)•••
00 00
Timer A2 interrupt control register
(7716)•••
00 00
Timer A3 interrupt control register
(7816)•••
00 00
Timer A4 interrupt control register
(7916)•••
00 00
Timer B0 interrupt control register
(7A16)•••
00 00
Timer B1 interrupt control register
(7B16)•••
00 00
Timer B2 interrupt control register
(7C16)•••
00 00
INT0 interrupt control register
(7D16)•••
0000 00
INT1 interrupt control register
(7E16)•••
0000 00
INT2/Key input interrupt control register
(7F16)•••
0000 00
Processor status register (PS)
000 ? ?0001 ??
Program bank register (PG)
0016
Program counter (PCH)
Content of FFFF16
Program counter (PCL)
Content of FFFE16
Direct page register (DPR)
000016
Data bank register (DT)
0016
Contents of other registers and RAM are undefined during reset. Initialize them by software.
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