20-101-0303 Rabbit Semiconductor, 20-101-0303 Datasheet - Page 27
20-101-0303
Manufacturer Part Number
20-101-0303
Description
SMARTSCREEN OP7100 W/TOUCHSCREEN
Manufacturer
Rabbit Semiconductor
Datasheet
1.101-0303.pdf
(126 pages)
Specifications of 20-101-0303
Display Type
STN - Super-Twisted Nematic
Viewing Area
121.00mm L x 91.00mm W
Backlight
CCFL - White
Dot Pitch
0.36mm x 0.36mm
Dot Pixels
320 x 240 (QVGA)
Interface
Serial
Product
Prototyping Accessories
Processor Type
Z180
Sram
128 KB
Flash
512 KB
Number Of I/os
16
Backup Battery
3 V Lithium Coin Type
Operating Voltage
10 V to 30 V
Power Consumption
4.5 W
Interface Type
Ethernet
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Display Mode
-
Dot Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
20-101-0303
20-101-303
20-101-303
316-1175
20-101-303
20-101-303
316-1175
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Of course, if the
will just power down.
Call the Dynamic C function
routine to make sure that the watchdog timer does not time out and thereby
reset the processor. The controller can continue to run at low voltages, and
so it might not be able to detect the low-voltage condition after the
watchdog timer resets the processor.
Watchdog Timer
To increase reliability, the ADM691’s watchdog timer forces a system reset if
a program does not notify the supervisor nominally at least every second. The
assumption is that if the program fails to “hit” the watchdog, the program
must be stuck in a loop or halted. The Dynamic C function for hitting the
OP7100
main(){
}
...
char dummy[24];
...
#define INT1 _ BIT
#INT _ VEC INT1 _ VEC power_fail_isr
#asm
#endasm
do whatever service, within allowable execution time
...
power_fail_isr::
loop:
timeout:
ld
call hitwd
ld
in
bit
jr
jp
DC
sp,dummy+24
bc,INT1
a,(c)
INT1_BIT, a ; check for status of /PFO
nz,loop
timeout
input voltage continues to decrease, then the OP7100
hitwd
0
; make sure no watchdog reset
; while low voltage
; load the read INT1 register
; to bc
; read the read INT1 register
; for /PFO
; wait until the brownout
; clears
; then...a tight loop to
; force a watchdog timeout,
; resetting the Z180
during the power-failure service
; bit 0
; force stack pointer
; to top of dummy vector
; to prevent overwriting
; code or data
Hardware 27
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