ePVP6800
VFD Controller
1
General Description
The ePVP6800 is an 8-bit RISC type vacuum fluorescent display (VFD) controller equipped with low
power consumption and high speed CMOS technology. This integrated single chip features on_chip
watchdog timer (WDT), one time programming ROM (OTP), data RAM, programmable real time
clock/counter, internal interrupt, power down mode, IR detector, and high voltage output for VFD
application.
2. Feature
2.1 CPU
Crystal Oscillator (32.768KHz): with a external crystal
2k x 13 on chip Program ROM.
144 x 8 general purpose registers
128 x 8 on chip data RAM
16 level stack for subroutine nesting
5 channel 8-bit counters:
real time clock/counter (TCC) ,COUNTER1, COUNTER3,
COUNTER4, COUNTER5
1 channel 16-bit counter:
COUNTER2
On-chip watchdog timer (WDT)
99.9
％
single instruction cycle commands
Four operation modes (
Mode
Sleep mode
Idle mode
Green mode
Normal mode
CPU Status
Turn off
Turn off
Turn on
Turn on
Main Clock
Turn off
Turn off
Turn off
Turn on
32.768kHz Clock Status
Turn off
Turn on
Turn on
Turn on
* Main clock can be programmed from 447.829k to 17.91MH by internal PLL
*
8 main clocks:
447.829K, 895.658K, 1.791M , 3.582M , 7.165M ,1 0.747M ,
14.331M and 17.91MHz
11 interrupt source, 5 external (IR , INT1~INT4 ), 6 internal (TCC, COUNTER1~5)
2.2 GPIO
GPIO 9 Port(8 bit): general purpose input/output; LED output ;interrupt function
GPIO C Port(4 bit): general purpose input/output for switch and key scanning 4x4 matrix)
2.3 VFD
Multiple display modes (6-segment & 11-digit to 8-segment & 9-digit)
External resistor not necessary for driver outputs.(P-ch open-drain + pull-down resistor output)
This specification is subject to change without further notice.
11.28.2004 (V123)
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EMC [ ELAN MICROELECTRONICS CORP ]
