WorkCentre 385
12/98
7 - 26
Circuit Description
Reset Circuit
Reset circuit consists of power reset including
primary reset (/F_POR), secondary reset (/POR)
and reset (/RSTO) by watch dog timer. Primary
reset is used to initialize flash memory when the
system power turn on, secondary reset is used to
initialize all the system by initializing MFP
controller
(U1) after initializing flash memory.
In primary reset, flash memory is read mode
enabling to fetch program code, in secondary
reset, MFP controller (KS32C6100) is waked up
and external peripheral is initialized, the system is
activated.
Figure 7-8 is block diagram related to the system
reset, figure 7-9 is timing diagram.
FIG. 7-8: POWER RESET DIAGRAM
U35
Power Monitor
KIA7045AP
U27, U28
Flash Memory
AM29F400A
POR
/RST_OUT
U1
KS32C6100
MFP Controller
SCAN_IP (U18), MODEM (U15)
PRINTER CONTROL LOGIC
/R_POR
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Summary of Contents for WorkCentre 385
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