Tandy 1000 HX Technical Reference Manual page 256

. TANDY COMPUTER PRODUCTS
TIMING CONTROL GENERATOR
TANDY PART # BD75306
MAY 07, 1986
REV 050886
1.0 G E N E R A L D E S C R I P T I O N
1.1 The Tandy part # 8 0 7 5 3 0 6 - Timing Control G e n e r a t o r :
- c r e a t e s eight clock o u t p u t s from two independent
osc i I Iator i n p u t s .
- s y n c h r o n i z e s the ready s i g n a l s .
- s y n t h e s i z e s the system control s t r o b e s from the C P U
status s i g n a I s .
- interfaces the system s i g n a l s (HOLD* H L D A ) with t h e
CPU s ignals (RQ/GT) .
- c r e a t e s two F D C chip s e l e c t s and the DMA request
deI ay.
1 —
2—
3 —
4—
5—
6 —
7 —
a—
9—
1 0 —
1 1 —
1 2 —
13 —
1 4 —
15 —
1 6 —
17 —
1 8 —
19—
2 0 —
! VIDLJAITB
! FAST
! D4CLK
1
FDCDRQ
! DFDCDRQ
AD2
' ALE
DENB
IOUB
IORB
CLK8M
CLK14M
CLK3580K
0SC16M
VCC
CPUCLK
CLK4770K
S2B
SIB
SOB
HOLDB
CLK4M
FDCUCK
FDCCHPB
DORCLK
FDCCSB
RDYIN
IOB/M
MEMRB
MEMUB
INTCSB
READY
HLDA
0SC2BM
GND
RQ/GTB
INTAB
READ
RESET
RSTINB
!—40
1—39
! — 3 8
1—37
1—36
i—35
!—34
— 3 3
— 3 2
— 3 1
— 3 0
— 2 9
— 2 8
— 2 7
— 2 6
— 2 5
— 2 4
— 2 3
— 2 2
— 2 1
Figure 1. Pin Assignment