FAQ
1
2012.11 Ver.00
ISD15D00/3800 trouble shooting manual
1 Description
This document describe troubleshooting steps and methods of ISD15D00 and ISD3800. User
can check problems with check list or reference the check steps of chapter3: VPE +
Demo board.
2
Check list:
Environment1: VPE + Demo board
①
Check clock(3.2)
：
Check CLK CFG by VPE & check J9 Jumper* if use EXT_RES or XTAL
②
Check CFG(3.1)
③
Already
burn device(3.4)
?
Environment2: VPE + User
’s board with ISD15D00/3800
①
Check clock(3.2)
：
Check CLK CFG by VPE & check crystal or resistor for EXT_RES
②
Check CFG(3.1)
③
Already
burn device(3.4)
?
Environment3: User
’s MCU + Demo board
①
Check SPI commands sequence(5.1)
and reset signal
②
Check SPI waveform
by scope
(3.6)
. Also check if SSB pull high after command.
③
Already
burn device(3.4)
?
④
Check clock(5.4)
：
Check CLK CFG & check J9 Jumper* if use EXT_RES or XTAL
⑤
Check CFG(5.5)
⑥
Check status byte(5.6)
General check: for any ISD3800 application environment
⑦
Check if Flash is empty. Check system VMs: POI VM, PU VM and Wakeup VM. Check
Schematic.
⑧
Understand timing
⑨
Know how to unlock a device which is locked by bad flash content.
⑩
Know how to solve the programming difficulty under certain configurations.
※
J9
’s printing “Ext_Res” and “XTAL” are reversed. Be careful Jumper’s position.
