UP-3500 (serv.man29). UP3500 Hardware Service Manual - Sharp EPOS Service Manual (repair manual). Page 31

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UP-3500 (V)
HARDWARE DESCRIPTION
– 29 –
7-2. OPERATION FLOW
 Power ON / CKDC reset (Reset switch: Neighborhood of the expansion SRAM socket) 
 Power OFF
8. INTERRUPTION
The interruption is as shown below. 
 CPU port
 FPGA
For USART, UART, and software interruption, refer to the item of the
FPGA. 
POFF# cancel 
NO  
YES 
CKDC sleep  
Power  ON
CKDC reset 
CKDC boot 
CKDC system reset cancel 
FPGA configuration 
FPGA DONE rising 
CPU reset cancel
STOP# generates ?  
 
Standby 
POF detection 
(CKDC,CPU) 
YES or when STOP# does not generate for 100ms. 
CKDC system reset execution 
NO (up to 100ms) 
CPU
I/O
External 
signal name
Remark
IRL2
I
TOUCH_INT#
TOUCH PANEL INTRRUPT
IRL1
I
FPGAINT#
FPGA INTRRUPTUSART, UART,
CKDC, SOFT INT, LAN, MCR
IRL0
I
POFF#
POFF# signal
CMT/CTR3
I
CKDC_SHEN#
SHEN# signal
CMT/CTR3
I
MCRINT#
MCRINT# signal
FPGA
I/O
External 
signal name
Remark
EXINT1#
 I
KRQ# 
CKDC interruption
EXINT2#
 I
LANINT#
LAN controller interruption
EXINT3#
 I
MCRINT#
MCR interruption
EXINT4#
 I
SHEN#
CKDC SHIFT ENABLE
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