Holtek HTG2190 Manual page 6

Pad Descriptions
Pad No. Pad Name
37~1
SEG0~SEG39
114~112
53~38 COM0~COM15
VOUT11, VOUT22
54~57
VOUT33, VOUT44
62, 61, CAP1, CAP2,
60, 58 CAP3, CAP4
59, 63
TRIM1~TRIM4
66, 67
64 VSS
68 OSCI
65 OSCO
69 VDD
70 INT/SIN
71 RES
72 PWM2/AUD
73 PB0/PWM1
74 PB7/TMR0
75 PB6/TMR1/RTF
Rev. 1.20
I/O Mask Option
¾
O LCD segment signal output
¾
O LCD common signal output
¾
O LCD driving power generated
LCD system voltage booster condenser connecting termi-
¾ ¾
nal.
¾ ¾
Test pin only
¾ ¾
Negative power supply, ground
OSCI and OSCO are connected to an RC network or a crys-
I
tal (by mask option) for the internal system clock. In the
Crystal or RC
case of RC operation,OSCI is connected to the RC network
O
of the internal system clock.
¾ ¾
Positive power supply
Selectable as external interrupt Schmitt trigger input or serial
data input by mask option. External interrupt Schmitt trigger
INT or Serial
I input with pull-high resistor. Edge triggered activated on INT
Data Input
or Serial data input a high to low transition. Serial data input
with pull-high resistor. INT shares pad with SIN.
Schmitt trigger reset input. Active low without pull-high re-
¾
I
sistor.
PWM2 CMOS
Selectable as negative PWM CMOS output or audio output
O Output or
by mask option. PWM2 share pad with AUD.
AUD Output
Selectable as bidirectional input/output or positive PWM
I/O I/O or CMOS output by mask option. On bidirectional input/output
or PWM1 CMOS mode, software instructions determine whether each pad is
O Output a CMOS output or Schmitt trigger input with pull-high resis-
tor. PB0 shares pad with PWM1.
Selectable as bidirectional input/output or TMR0 input by
mask option. On bidirectional input/output mode, software
I/O instructions determine whether it is a CMOS output or
I/O or
or Schmitt trigger input with pull-high resistor. On TMR0 input
TMR0 Input
I mode, it uses Timer/Event Counter 0. Software can be
optioned with or without pull-high resistor. PB7 shares pad
with TMR0.
Selectable as bidirectional input/output or TMR1 input or
RTF input by mask option. On bidirectional input/output
I/O or mode, software instructions determine whether it is a
I/O
TMR1 Input CMOS output or Schmitt trigger input with pull-high resistor.
or
or On TMR1 and RTF input mode, it uses Timer/Event Coun-
I
RTF Input ter 1. Software can be optioned with or without pull-high re-
sister and be option the RTF function disable or enable.
PB6 and TMR1 share pad with RTF.
6
HTG2190
Description
July 5, 2002