Timer Feature Physical Characteristics; Signal Pin Assignments - IBM 1 Series Manual

Timer Feature Physical Characteristics
Signal Pin Assignments
User-supplied
2X8
connector
Figure 3-4.
The external interface is available at the top of the timer card on a 2 x 8
polarized top-card connector (TCC). See Figure 3-4. The pin assignments
are:
Pin
AOl1
A02
AOQ3
A04
AO5
A06
AO7
A08
BOI
BO2
BO3
B04
BO5
B06
BO7
BO8
Signal
Timer 0 clock
Timer 0 external gate
Timer 0 run state
Timer O external gate enable
Timer O customer signal ground
Not used
Not used
Frame ground strap
Not used
Not used (polarizing pin)
Not used
Timer 1 customersignal ground
Timer 1 external gate enable
Timer 1 run state
Timer | external gate
Timer 1 clock
Timer card
YN
Timer card and cable connector
A B
07,0 8
O;O 7
O]}O}] 6
O;O] 5
O1|Q] 4
O!1O] 3
O 2
O;Q] 1
Pin view
Timer Feature 3-11