3
6
5.3.2 Connector Pins
Figure 5.5 shows the pins of a 15-pin serial interface connector (CN1).
Figure 5.5 15-pin Serial Interface Connector Pins
5.3.3 Register Map
Tables 5.4 and 5.5 show register maps for the serial interface controller registers. Each of the serial interface
controller registers must be accessed in words. If access takes place in words, data in the low order 8 bits (D7 to
D0) will become effective.
Table 5.4 Serial Interface Control Register Map (Channel A)
Address
Initial value
Register name (at resd)
Register name (at write)
Remarks
H’BA000000
-
RHR
(Receive Holding Register)
THR
(Transfer Holding Register)
LCR
bit7=0
H’BA000000
-
DLL
(LSB of Divisor Latch)
DLL
(LSB of Divisor Latch)
LCR
bit7=1
H’BA000002
H’00
IER
(Interrupt Enable Register)
IER
(Interrupt Enable Register)
LCR
bit7=0
H’BA000002
-
DLM
(MSB of Divisor Latch)
DLM
(MSB of Divisor Latch)
LCR
bit7=1
H’BA000004
H’01
ISR
(Interrupt Status Register)
FCR
(FIFO Control Register)
H’BA000006
H’00
LCR
(Line Control Register)
LCR
(Line Control Register)
H’BA000008
H’00
MCR
(Modem Control Register)
MCR
(Modem Control Register)
H’BA00000A
H’60
LSR
(Line Status Register)
N.A
H’BA00000C
H’X0
MSR
(Modem Status Register)
N.A
H’BA00000E
H’FF
SPR
(Scratchpad Register)
SPR
(Scratchpad Register)
1
15
CN1: 15-pin serial connector
Model name: RMC-EA15MY-OM15-MC1
Moker: Honda Tsushin Kogyo
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
GND
CTS
RTS
GND
RxD
TxD
GND
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Signal name
Pin No