Electronics America Computer Hardware User Manual

339
Chapter 12 Interrupt Functions
12
Fig. 12-31 Block Diagram 1 for Automatic Addition Control Plus Ring Control
(Constant-Speed Rotation with Phases 1 and 2 Excitation)
MSC
FF
–1
Ring counter (RC)
08
–1
Modulo register (MR)
08
MPDL
00
+1
MPDH
B0
MPTL
00
MPTH
B1
Mode register
CE
Channel pointer
CF
0FECFH
Macro service
control word
Macro service
channel
•
•
•
D0
D1
D7
∆t
•
•
•
Compare register
CR10
P00
Output latch
Coincidence
INTC10
P0
8-bit timer/counter 1
TM1
Addition
Buffer register
P0L
•
•
•
0B000
0B001
0B007
•
•
•
Output data
(8 pieces)
Output timing: 0B100
64K memory space
P01
P02
P03
To stepper motor