10
Signals at the VG-connector
Name of signal
contact
description
GND
32a+c
reference potential
VCC in (+5V)
1a+c
+5V power supply
/BSL
4a
control input for firmware updates
TTL level, active low
/Reset in/out
9c
reset signal, TTL level, active low
10MHz in
12a
reference frequency 10 MHz, TTL level
CLK 4.096MHz in 21c
reference frequency 4.096 MHz, sine-wave
COM0 TxD out
26c
COM0 RS-232 output
COM0 RxD in
30c
COM0 RS-232 input
SW1 in
16c
input for mode control, TTL level
low: E1-mode
high: T1-mode
SW2 in
15c
control input reserved for expansion, TTL level
SW3 in
14c
control input reserved for expansion, TTL level
