HT49CV5 Holtek Semiconductor, HT49CV5 Datasheet - Page 4

• Manufacturer Part Number: HT49CV5
• Description: A/D
• Manufacturer: Holtek Semiconductor

Absolute Maximum Ratings
Supply Voltage ...........................V
Input Voltage..............................V
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
Rev. 1.20
PD0/PWM0
PD1/PWM1
PD4/INT0
PD5/INT1
PD6/TMR0
PD7/TMR1
VSS
VEE
SEG0~SEG10
SEG11/Grid10~
SEG15/Grid6
Grid0~Grid5
SDI
SDO
SCK
SCS
OSC4
OSC3
VDD
OSC2
OSC1
RES
Pin Name
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.
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
I
I
I
I
System Clock
Crystal or RC
Pull-high
Pull-high
Options
RTC or
PWM
SS
SS
0.3V to V
0.3V to V
Bidirectional 2-bit input/output port. Software instructions determine if the pin
is a CMOS output or Schmitt trigger input with or without a pull-high resistor
(determined by pull-high option: bit option). PD0~PD1 are pin-shared with
PWM0~PWM1 (dependent on Mask options).
Bidirectional 4-bit input/output port. Software instructions determine if the pin
is a CMOS output or Schmitt trigger input with or without a 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 con-
trol).
Negative power supply, ground
VFD Negative power supply
High voltage segment output for VFD panel.
High voltage output for VFD panel. These pins are selectable for segment or
grid output.
High voltage grid output for VFD panel.
Serial interface serial data input
Serial interface serial data output
Serial interface serial clock input/output (initial input ).
Serial interface chip select pin, output for master mode, input for slave mode.
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.
Positive power supply
OSC1 and OSC2 are connected to an RC network or a crystal (by options) 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 oscillator. If the sys-
tem clock comes from RTCOSC, these two pins can be left floating.
Schmitt trigger reset input, active low
DD
SS
+6.0V
+0.3V
4
Storage Temperature ............................ 50 C to 125 C
Operating Temperature........................... 40 C to 85 C
Description
HT49RV5/HT49CV5
April 14, 2006