10. WAIT control
The weight control function built in the MPCA8 is used to provide an
interface with low-speed devices.
10-1. Block diagram
The block diagram of the wait control function is shown.
Fig. 10
In the figure, the decoder, wait enabling register, AND-OR sections
are the same as those in the MPCA6 or 7, but other components are
newly incorporated in the MPCA7.
EXWAITZ and WAITZ are external weight signals which are to be
ORed inside the MPCA8 and output to the WAITZ. The EXWAITZ is
a general-purpose wait request terminal, and WAITZ is the wait re-
quest signal from the VGA controller.
11. CKDC9
The UP-3300 performs the following controls, using CKDC9.
• Customer display
• Clock
• Buzzer
• System reset
11-1 Interface
CKDC9 is connected through the MPCA8.
Fig. 11
12. Option RAM interface
12-1. Interface
The expanded RAM connector terminals are shown in the table.
The 72 pin S.O. DIMM is used for the connector.
Extension RAM connector terminals
ADDRESS
DECODER
RAS
ROS
IO
X3
WAIT
ENABLE
REGS.
ENABLE
1WAIT
2WAIT
3WAIT
WAIT PULSE
GENERATOR
ADDRESS
DATA
WAIT
CONTROL
REGS.
EXWAITZ
VWAITZ
S
E
L
E
C
T
E
R
WAITZ
<00FF8Dh>
<00FF8Fh>
DATA
TXD2(P87)
SCK2(P83)
RXD2(P84)
IRQ0
RES
STOP
(P57)
FT12
HTS
SCK
STH
TXD1
SCL1
RXD1
IRQ0
HTS1
SCK1
STH1
INT1
RESET
HTS
SCK
STH
KRQ
SHEN
SRES
STOP
SWRESET
RESET
H8/510
MPCA8
Standard
CKDC9
Signal
Name
Pin
No.
GND 1
GND 2
—3
—4
—5
—6
—7
—8
—9
—10
A14 11
A15 12
A16 13
A17 14
A18 15
A19 16
—17
PCE22_E 18
PCE21_E 19
—20
PSREF 21
PCE22_O 22
PCE21_O 23
GND 24
Signal
Name
Pin
No.
—25
—26
—27
—28
A13 29
A12 30
A11 31
A10 32
A9 33
A8 34
A7 35
A6 36
A5 37
A4 38
A3 39
A2 40
A1 41
A0 42
D15 43
D14 44
D13 45
D12 46
D11 47
D10 48
Signal
Name
Pin
No.
D9 49
D8 50
D7 51
D6 52
D5 53
D4 54
D3 55
D2 56
D1 57
D0 58
GND 59
NC 60
OWR 61
—62
—63
—64
—65
—66
HWR 67
—68
VMEM 69
VMEM 70
GND 71
GND 72
7 – 25
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