HT49CV9 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT49CV9 Datasheet PDF : 48 Pages
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HT49RV9/HT49CV9
Pin Name
I/O
PD4/INT0
PD5/INT1
PD6/TMR0
I/O
PD7/TMR1
RMT
I
VSS
¾
VEE
¾
SEG0~SEG11
O
SEG12/GRID15~
SEG19/GRID8
O
GRID0~GRID7 O
SDI
I
SDO
O
SCK
I/O
SCS
I/O
OSC4
O
OSC3
I
VDD
¾
OSC2
O
OSC1
I
RES
I
Options
Description
Pull-high
Bidirectional 4-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt trigger input with or without pull-high
resistor (determined by pull-high option: bit option). Pins PD4~PD7 are
pin-shared with INT0, INT1, TMR0 & TMR1, respectively (determined by
software control).
Pull-high
RMT with wake-up function (both rising and falling edge) and Schmitt
trigger input with or without pull-high resistor (determined by pull-high
option).
¾
Negative power supply, ground
¾
VFD negative power supply
¾
High-voltage segment output for VFD panel.
¾
High-voltage output for VFD panel. These pins are selectable for seg-
ment or grid output.
¾
High-voltage grid output for VFD panel.
¾
Serial interface serial data input
¾
Serial interface serial data output
¾
Serial interface serial clock input/output (initial ²input²)
¾
Serial interface chip select pin, output for master mode, input for slave
mode.
RTC or
System Clock
Real time clock oscillators. OSC3 and OSC4 are connected to a
32768Hz crystal oscillator for timing purposes or to a system clock
source (depending on the options). No built-in capacitor
¾
Positive power supply
Crystal or RC
OSC1 and OSC2 are connected to an RC network or a crystal (by op-
tions) for the internal system clock. For RC operation, OSC2 is an output
pin for 1/4 system clock. The system clock may come from the RTC os-
cillator. If the system clock comes from RTCOSC, these two pins can be
left floating.
¾
Schmitt trigger reset input, active low
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Rev. 1.00
4
April 20, 2006
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