70
Smartcat (BL2100)
PB4
Input
I/O Configuration Option
(header JP2)
1 = standard (JP2:1–2)
0 = custom
*
(JP2:2–3)
PB5
Input
Analog Circuit Option
(header JP3)
1 = BL2100/BL2120 (JP3:1–2)
0 = BL2110/BL2130 (JP3:2–3)
PB6
Output
Not Used
Off
PB7
Output
DAC_ADC_SDI
Inactive high
PC0
Output
TXD RS-485
Serial Port D
Inactive high
PC1
Input
RXD RS-485
Inactive high
PC2
Output
RTS/TXC RS-232
Serial Port C
Inactive high
PC3
Input
CTS/RXC RS-232
Inactive high
PC4
Output
TPOUT– (Realtek reset)
Initialized by
sock_init
PC5
Input
TPOUT+ (Realtek INT0)
Pulled up
PC6
Output
TXA Programming Port
Serial Port A
Inactive high
PC7
Input
RXA Programming Port
Inactive high
PD0
Input
Realtek CLK
Initialized by
sock_init
PD1
Input
Realtek SDO
Initialized by
sock_init
PD2
Output
Not used
Inactive high
PD3
Output
DAC CLK Line
Inactive high
PD4
Output
ATXB RS-232
Serial Port B
Inactive high
PD5
Input
ARXB RS-232
Inactive high
PD6
Output
Not used
Inactive high
PD7
Output
Not used
Inactive high
PE0
Output
Digital I/O strobe
Inactive high
PE1
Output
External I/O enable
Inactive high
PE2
N/A
Realtek IORB strobe
Initialized by
sock_init
PE3
N/A
Realtek SDI line
Initialized by
sock_init
PE4
Input
INT0B
Tied to PE5 by 1 k
resistor
PE5
Input
INT1B
User interrupt input
†
PE6
N/A
Realtek IOWB strobe
Initialized by
sock_init
PE7
Output
LCD_KEYPAD strobe
Inactive high
* IN16–IN23 are sinking outputs in this custom configuration
† PE5 is driven by PE4 if the interrupt is not being used.
Table A-3. Use of Rabbit 2000 Parallel Ports (continued)
Port
I/O
Signal
Output Function State
Содержание BL2100
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