RabbitCore RCM2200, Руководство пользователя

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2–2 Hardware Reference RabbitCore RCM2200
The RabbitCore RCM2200 has 26 parallel
I/O lines grouped in five 8-bit ports available on
headers J4 and J5. The 16 bidirectional I/O lines are located on pins PA0–PA7, PD3–PD5, and PE0–PE1,
PE4, PE5, and PE7. The pinouts for headers J4 and
J5 are shown in Figure 2–2.
2.1.1 Dedicated Inputs
PB0 is a general CMOS input when the Rabbit 2000
is either not using Serial Port B or is using Serial
Port B in an asynchronous mode. Four other general
CMOS input-only pins are located on PB2–PB5.
These pins can also be used for the slave port. PB2
and PB3 are slave write and slave read strobes,
while PB4 and PB5 serve as slave address lines SA0
and SA1, and are used to access the slave registers.
PC1 and PC3 are general CMOS inputs only. These
pins can instead be selectively enabled to serve as
the serial data inputs for Serial Ports D and C.
2.1.2 Dedicated Outputs
One of the general CMOS output-only pins is
located on PB7. PB7 can also be used with the slave
port as the /SLAVEATTN output. This configura-
tion signifies that the slave is requesting attention
from the master. PC0 and PC2 are also output-only
pins; PC0 and PC2 can instead serve as the serial
data outputs for Serial Ports D and C.
2.1.3 Memory I/O Interface
Four of the Rabbit 2000 address lines (A0–A3) and
all the data lines (D0–D7) are availabl. I/0 write
(/IOWR) and I/0 read (/IORD) are also available for
interfacing to external devices.
The ports on the Rabbit 2000 microprocessor used
in the RabbitCore RCM2200 are configurable, and so
the factory defaults can be reconfigured. Table 2–1
lists the Rabbit 2000 factory defaults and the alter-
nate configurations.
2.1.4 Other Inputs and Outputs
As shown in Table 2–1, pins PA0–PA7 can be used
to allow the Rabbit 2000 to be a slave to another
processor. The slave port also uses PB2–PB5, PB7,
and PE7.
Figure 2–2: RabbitCore RCM2200 I/O Pinouts
Note: These pinouts are as seen on
the Bottom Side of the module.
VCC
PC1
PC3
TPOUT+
PD3
PD5
/IOWR
PE1
TPIN+
PE5
PE7
A2
A0
GND
PC0
PC2
TPOUT-
LNK
PD4
/IORD
PE0
TPIN-
PE4
ACT
A3
A1
J4
PA0
PA2
PA4
PA6
/RES
PB2
PB4
PB7
D6
D4
D2
D0
VCC
PA1
PA3
PA5
PA7
PB0
PB3
PB5
D7
D5
D3
D1
VBAT
GND
J5