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@-1 Pin Assignments & Signal Descriptions (ASIC)
Signal Description
This appendix lists the signals assigned to each RUNT pin and
provides a brief description of each of those signals.
TABIQ
tablet interrupt
31 | LCD_LVC_ON
© | High | Enable bias
voltage generator
32
_[LcD_cs
© | High | icd chip enable
33_| GND
34 | LCD_CLK
© | High | 3.3Mhz clock for
LCD operations
35 | LCD_BUSY
1 | High
| cd bu
GEN_WR_L
~
ania in
converter, sec and
eaareee)
|__| tea
LCD_DC_CLK
© | High | 32.768Khz clock
5
|SCC_AB
High | sce channel a/b
for PWM for
select
+24V, -5V
6 | SCC_cEL
Low _| sce chip enable
Oo)
Gar
lene
7
|Sscc_o_c
High | scc data/control
integrator
select
VOLO
O | High | sound out volume
8 | ATXCLK
High | scc bus clock
control 0
3.6364mhz, or
39 | VOL1
© | High | sound out volume
Lea
control 1
9 | SCCWREQA_L
Low | scc channel a
40 | POWERMAIN
© | High | enable main
dma write request
power supply
10 | SCCWREQB_L
Low | sce channel b
41 | NICAD_IN
1 | High | nicad batteries
dma write request
are installed
41 | SIO
Low _| sco interrupt
42 | VCCFAULT_L
T | Low | vecnot within
12 | SCC_TxDB
High | pre modulated ir
regulation
43 | SAMP_TEMP
© | High | connect
ead
temperature
13 | (R_TXD_L
Low
sensor to a/d
converter
module
44 | SAMP_BACK
© | High | connect lithium
14 | SCCDTRREQA_L
battery to a/d
dma read request
converter
15 | SCCOTRREQB_L
45_| GNDS
46 | SAMP_MAIN
© | High | connect main
16 | ADIQ
Hight
battery to a/d
17
[vo
converter
18 | AD_VREF_ON_L
Low | a/d enable voltage
47 | SAMP_TAB
© [| High | connect tablet to
reference
a/d converter
[19
[AD_cs_t
Low _| ald chip enable
48 | SYSRESET_L
1 | Low | system reset
20 | AD_CKI
High | a/d clock signal
switch
2.0 mhz
49 | SYSPOWER_L
T | Low | system power on
21 | GPr
High | Extemal system
button
wakeup, serial
50 | CARDLOCK_L
T | Low | card lock switch
GPI signal
disengaged
22 | TAB_SWX_L
Low | TumonX
31 | BATCOV_L
1 | Low | battery cover
sampling drive,
opened
avive low
82 | BFAULT_L
1 | Low | main battery
23 | TAB_SWX
High | Tum on X
failure or
sampling drive,
disconnected
active high
53. | XSVTRIM_ON
© | High | enable card +5V
[ 24 | GND2
supply
25 | TAB_SWY_L
Low | Tumony
54 | XSVSERIAL_ON
© | High | enable sce, driver
sampling drive,
and IR supply
avtive low
55 | XSVSOUND_ON
© | High | enable sound out
26 | TAB_SWY
High | Tum on ¥
supply
sampling drive,
56 | X12V_CONT_1
© | High | enable voltage
active high
vppt, from
27 | TAB_MON
High | Set up tablet for
+5VTRM to +12V
threshold
57 | X12V_CONT_2
© | High | enable voltage
measurements
vpp2, from
28 | TAB_XMON_L
Low | Set up tablet for
+5VTRM to +12V
threshold
58 _| PCMCIAGCD2_L
© | Low | carddetect2
measurements
59
| VDD
29 | TAB_YMON_L
Low | Setup tablet for
60 | WPAOIS16"
10 | Low | write protect/io
portis 16 bits
61_|
PCMCIADATA10
10 [ High | data bus
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