Pc Mouse Microcomputer Imoi - Hitachi 36SDX88B Service Manual

5. PC-MOUSE Microcomputer IMOI (M37470M4)
(see Fig. 5.1 and 5.2)
In PC mode, PC-PS2 mouse can be controlled by the R/C handset through a connection to the PC via the 6pin
mini din jack provided at the rear of the unit. The microcomputer for mouse control is lMO1 (M37470M4, an 8-bit
controller). 1001 the main u-con is the master and IMOI is the slave. Communication between the PC, 1001, and
lM0-l is through Bi-directional Serial Bus of TTL level.
Communication request from the PC is through the PS-2 CLK. and DATA lines. lMO1 REQ. output (pin #I) is sent
to 1001 (pin #4). 1001 sends CLK and DATA signals from pins 8 and 12 to IMOI pins 2 and 4.
QMOI and QM02 are switches send elk and data signals to PC via the I/O pins of the jack (JM03). IMOI pin#l8
is the reset IM02 is the reset IC which holds pin #I8 "L" for 2uS or more until the VCC rises to approx. 5V.
#I2
CLK
#IO
PS-REQ
7%
DATA
lM02
Reset
L-t
#7-PS
DATA IN
##4-
#8-PS
CLK DATA OUT
IMOI
#I8
#5-PS
Reset
CLK in
#2-
#6-PS
CLK CLK OUT
#l- #9-PS
REQ IN
PS-CLK
Fig. 5.1 SYSTEM BLOCK DIAGRAM
REQ. To IOOl(main u-Con)- I
0
CLK from lOOl(main u-Con) - z
0
NC
0
3
DATA from 1001 (main u-Con) - 4
0
PC-PS2 CLK in - 5
0
CLK out to PC-PS2-
6
0
PC-PS2 DATA in- 7
0
DATA out to PC-PS2-
8
0
PC-PS2 +5V -
9
0
NC
0
10
NC
0
11
NC
0
12
Ref.(V) input for A/D conv. -
13
0
Xin-
14
0
Xout - 15
0
GND
0
16
Fig. 5.2 I
Gp-Din
Jack
(JM03)
to PC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
0 32
0
31
0
30
0
29
0
28
0
0
26
0
25
0
24
0
23
0
22
0
21
0
20
0
19
0
18
- RESET
0
17
vcc
II01 PIN ARRANGEMENT.
102