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 + Dongle +
Demo board.
2 Check list:
Environment1: VPE + Dongle + 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 + Dongle + 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.
