User`s manual

MiniCore RCM5700/RCM6700 User’s Manual rabbit.com 87
E.3.1 Configuration
Serial Ports C and D are brought out as 3-wire RS-232 serial ports on headers J4 and J3 respec-
tively. Jumpers may be installed on header JP7 to use header J3 as a 5-wire RS-232 serial port
with flow control provided by Serial Port C.
Jumpers on headers JP5 connect the MiniCore signals to the RS-232 transceiver. Jumpers may be
installed on header JP7 to use header J3 as a 5-wire RS-232 serial port with flow control provided
by Serial Port C. Note that Serial Port C does not support flow control using serial DMA, so the
following macro must be used with flow control via Serial Port C on the Serial Communication
accessory board.
#define SER_DMA_DISABLE
The jumpers at header JP5 connect the Serial Port D and Serial Port C signals to the RS-232 trans-
ceiver. These jumpers may be removed so that other MiniCore serial port signals may be con-
nected via JP6 to the RS-232 transceiver.
NOTE: Headers J1, J5, J6, and the associated circuits and configuration headers are not stuffed.
Table E-2. Serial Communication Accessory Board RS-232 Connection Options
Default
MiniCore
Signal
Header Serial Port
Connected via Alternate Connection
Header Pins Header Pin
PC0
J3
Serial Port D
(RS-232)
JP5
1–2
JP6
1
PC1 3–4 2
PC2
J3/J4
*
* Configured via header JP7.
Serial Port C
(RS-232)
5–6 3
PC3 7–8 4
PE6
J5
Serial Port E
(RS-232)
JP8
1–2
JP9
1
PE7 3–4 2
PC4
J5/J6
†
† Configured via header JP10 (unstuffed).
Serial Port B
(RS-232)
5–6 3
PC5 7–8 4
PD0 —
JP11
1–2
JP12
1
PD1
J1
‡
‡ Termination and bias resistors enabled via header JP13 (unstuffed).
Flow Enable 3–4 2
PD2
Serial Port F
(RS-485)
5–6 3
PD3 7–8 4