101-0567 Rabbit Semiconductor, 101-0567 Datasheet - Page 77

• Manufacturer Part Number: 101-0567
• Description: COMPUTER SNGL BD BL2100 IDC HDR
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0567

• Module/board Type: Single Board Computer Module
• For Use With/related Products: BL2100
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A.5 I/O Address Assignments
Table A-4 lists the external I/O addresses for the digital inputs and outputs.
PE1 serves as a system-enable control. When PE1 is high or in a high-impedance status,
all BL2100 outputs are disabled (digital outputs and analog outputs are disabled, and
RS-485 is at listen status).
PE0 is configured as a strobe and is used for digital inputs, digital outputs, and the control
register. The control register is located at 0xx4–0xx7, write only. The function of each bit
is listed in Table A-5.
PA0–PA7 are used with IN16–IN23, which may be reconfigured as sinking digital outputs
OUT16–OUT23 by installing/removing components as reflected in the schematic.
All analog inputs and outputs are accessed by a series connection. PD3 is served as a clock
line while PB0 and PB7 are used for data in and data out, respectively.
PD4 and PD5 are used for RS-485 communication. The direction of the communication is
controlled by the control register. PC0, PC1, and PC2, PC3 are used for RS-232 communi-
cation. They can be used separately as two 3-wire RS-232, or they may be combined to
work as a 5-wire RS-232 port.
User’s Manual
External
Address
Table A-5. Control Register Bit Map (External 0x0004–0x007)
0000
0001
0002
0003
Bit
0
1
2
3
4
5
6
7
485_SEND
DO_CS0
DO_CS1
Not used
AO_CS
DAC_CS0
DAC_CS1
ADC_CS
Name
Name
Table A-4. Digital I/O Addresses
DIPA
DOPA
DIPB
DOPB
Digital inputs IN00–07, read only
Digital outputs OUT00–OUT07, write only
Digital inputs IN08–15, read only
Digital outputs OUT08–OUT15, write only
RS-485 send/receive
Digital output 0–08, enable low active
Digital output 09–16, enable low active
Not used
Analog output 00–04, enable low active
Chip select for analog ch 00 and 01
Chip select for analog ch 02 and 03
Chip select for A/D converter
Function
Function
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