45
MITSUBISHI MICROCOMPUTERS
M37733MHBXXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PRELIMINARY
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to 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.
Fig. 53 Microcomputer internal status during reset
Address
0016
00 0 0
0016
0
11
00
0
?? ?
0016
0
00
10
00
10
00
10
0016
00 0
0
0016
0
00 1
00
0
00 1
00
0
00
0
0016
(0416)
(0516)
(0816)
(0916)
(0C16)
(0D16)
(1016)
(1116)
(1416)
(1E16)
(1F16)
(3016)
(3816)
(3416)
(3C16)
(3516)
(3D16)
(4016)
(4216)
(4416)
(5616)
(5716)
(5816)
(5916)
(5A16)
(5B16)
(5C16)
(5D16)
(5E16)
(5F16)
Port P0 direction register
Port P1 direction register
Port P2 direction register
Port P3 direction register
Port P4 direction register
Port P5 direction register
Port P6 direction register
Port P7 direction register
Port P8 direction register
A-D control register 0
A-D control register 1
UART 0 Transmit/Receive mode register
UART 1 transmit/receive
control register 1
UART 1 Transmit/Receive mode register
UART 0 transmit/receive
control register 0
UART 1 transmit/receive
control register 0
UART 0 transmit/receive
control register 1
Count start flag
One- shot start flag
Up-down flag
Timer A0 mode register
Timer A1 mode register
Timer A2 mode register
Timer A3 mode register
Timer A4 mode register
Timer B0 mode register
Timer B1 mode register
Timer B2 mode register
Processor mode register 0
Processor mode register 1
Address
(6016)
(7F16)
(6C16)
(6D16)
(6E16)
(6F16)
(7016)
(7116)
(7216)
(7316)
(7416)
(7516)
(7616)
(7716)
(7816)
(7916)
(7A16)
(7B16)
(7C16)
(7D16)
(7E16)
Watchdog timer register
Oscillation circuit control register 0
Port function control register
Serial transmit control register
Oscillation circuit control register 1
A-D/UART2 trans./rece. interrupt control register
UART 0 transmission interrupt control register
UART 0 receive interrupt control register
UART 1 transmission interrupt control register
UART 1 receive interrupt control register
Timer A0 interrupt control register
Timer B2 interrupt control register
Timer A1 interrupt control register
Timer A2 interrupt control register
Timer A3 interrupt control register
Timer A4 interrupt control register
Timer B0 interrupt control register
Timer B1 interrupt control register
Processor status register (PS)
Program bank register (PG)
Program counter (PCH)
Program counter (PCL)
Direct page register (DPR)
Data bank register (DT)
INT0
interrupt control register
0
Contents of other registers and RAM are undefined during reset. Initialize them by software.
?
0
00 0 0
0
?
001
00 0
1? ?
0
00 0 0
0
00
0
0016
Content of FFFF16
Content of FFFE16
000016
FFF16
0
INT1
interrupt control register
INT2
/Key input interrupt control register
0016
0
01
0
00
(6116)
(6316)
(6416)
(6816)
Watchdog timer frequency selection flag
Memory allocation control
UART2 transmit/receive mode register
UART2 transmit/receive control register 0
0 0
0
001
0
00
0
00
0
(6916)
UART2 transmit/receive control register 1
00 0 0
0
00
000
1
00 1 0
0
00
0
0016
0