Sharp UP-5700, Руководство по обслуживанию

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9. PS/2 Keyboard Controller
9-1. Introduction
The keyboard and mouse are controlled using Mitsubishi Electric’s
M38802M267.
No mouse can be used for UP-5700 because IRQ12 is not con-
nected. In addition, A20M# of M38802M2 is not used because Fire-
star’s A20M# is used.
M38802M2 Port5 Jumper Options
Pin No. Pin Name Setting Function
11 P50 0 4MHz speed
10 P51 1 AT code
9 P52 0 Phantom Key Check Enable
8 P53 1 Direct Port3 Matrix Read
Setting 1 = Pull up (Vcc5)
0 = Grounding
M38802M2 Keyboard Jumper Options
Pin No. Pin Name Setting Function
31 P20 1
Keyboard Matrix = 2
(OADG)
30 P21 0
29 P22 1
Setting 1 = Pull up (Vcc5)
0 = Grounding
9-2. Pin assignments
48
P0
0
47
P0
1
46
P0
2
45
P0
3
44
P0
4
43
P0
5
42
P0
6
41
P0
7
40
P1
0
39
P1
1
38
P1
2
37
P1
3
36
P1
4
35
P1
5
34
P1
6
33
P1
7
P37
P36
P35
P34
P33
P32
P31
P30
VCC
P61/CNTR0
P60/INT5/OBF2
DQ7
DQ6
DQ5
DQ4
DQ3
P20
P21
P22
P23
P24
P25
P26
P27
VSS
XOUT
XIN
P40
P40/INT0
RESET
CNVSS
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17 P42/INT1
1
DQ2
2
DQ1
3
DQ0
4
W
5
R
6
S
7
A0
8
P5
3/
SR
DY
9
P5
2/
SC
LK
10
P
5
1/TX
D
11
P5
0/
RX
D
12
P4
7/
IN
T4
13
P4
6/
IN
T3
14
P4
5/
IB
F
/O
BF
0
15
P4
4/
OBF
1
16
P4
3/
IN
T2
M38802M2-XXXFP
M38802M2-XXXHP
9-3. Pin description
Pin Name Features
Features other than port
Vcc, Vss Power input Impresses Vcc with 2.7 to 5.5V, and Vss with 0V.
CNVss CNVss Pin controlling the operation mode of chip.
Connect this pin to Vss.
R E S E T Reset input Pin for the reset input of active "L".
XIN Clock input Pin for the I/O of clock generator. Connect a ceramic resonator or crystal oscillator between XIN and
XOUT.
When using external clock, connect a clock generator to XIN and open XOUT.
A feedback resistor is incorporated.
XOUT Clock output
P00
~
P07 I/O port P0 8-bit I/O port.
I/O can be specified in bits using a program.
When resetting, these ports go into input mode.
CMOS input level is used, and the form of output is CMOS 3-state.
P10
~
P17 I/O port P1
P20
~
P27 I/O port P2 8-bit I/O port with the same feature as P0.
CMOS input level is used, and the form of output is CMOS 3-state.
The 4 bits of P24 to P27 can output large current for driving LED’s.
P30
~
P37 I/O port P3 8-bit I/O port with the same feature as P0.
CMOS input level is used, and the form of output
is CMOS 3-state.
Whether to use any internal pull up resister or not
can be selected using a program. Key input (key on wakeup interrupt input) pin
Comparator input pin
P40 I/O port P4 8 bits I/O port with almost the same feature as P0.
Input level can be switched between CMOS and
TTL, and the form of output can be switched
between CMOS 3-state and N-channel open drain.
Pin level can be inputted regardless of the setting
of input port or output port.
P41/INT0,
P42/INT1,
P43/INT2 Interrupt input pin
P44/OBF0,
P45/IB F/
OBF1 Data bus buffering pin
P46/INT3,
P47/INT4 Interrupt input pin
5 – 27