HT6513B データシートの表示（PDF） - Holtek Semiconductor
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HT6513B Datasheet PDF : 11 Pages
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HT6513B
Functional Description
Mouse system mode
Any change of state of the mouse key-switches
or photo-couplers will be detected by the chip
and transmitted over the RS-232C. The mouse
system protocol will send five words at a
1200/9600 baud rate with each word containing
10 bits, 1 start bit, 1 stop bit and 8 data bits.
The first, second and third words correspond to
key switch-status, horizontal counter and verti-
cal counter respectively. The auto-speed sensing
circuits ensure detection of higher mouse speeds
resulting in the use of the 4th and 5th words for
extra horizontal and vertical overflow counts re-
spectively. For lower mouse speeds the 4th and
5th words remain at zero.
Output word format
Bit No.
1st word
2nd word
3rd word
4th word
5th word
7
1
H7
V7
EH7
EV7
6
0
H6
V6
EH6
EV6
Mouse system word structures
5
4
3
2
0
0
0
L¢
H5
H4
H3
H2
V5
V4
V3
V2
EH5 EH4 EH3 EH2
EV5 EV4 EV3 EV2
1
M¢
H1
V1
EH1
EV1
0
R¢
H0
V0
EH0
EV0
¢: denotes complement valus
H0~H7: Horizontal counter valus
V0~V7: Vertical counter valus
EH0~EH7: Extra horizontal counter valus
EV0~EV7: Extra vertical counter valus
Microsoft plus (M+) mode
Three words are transmitted with each word di-
vided into 1 start bit, 7 data bits and 2 stop bits.
The ²L² and ²R² switch status together with the
two most significant bits of both vertical and
horizontal counters are transferred in this first
word. The second and third word represent the
horizontal and vertical counters respectively.
Note that this vertical data is recorded in 2¢s
complement format.
When the ²M² Switch is pressed or released it
will trigger the fourth word active.
Output word format
Bit Microsoft M+ word structures
No. 6 5 4 3 2 1 0
1st
word
1
L
R V7¢ V6¢ H7 H6
2nd
word
0 H5 H4 H3 H2 H1 H0
3rd
word
0 V5¢ V4¢ V3¢ V2¢ V1¢ V0¢
4th
word
0
M
0
000
0
6
February 1, 2000
This Material Copyrighted By Its Respective Manufacturer
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