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Instruction for users – FUJITSU MB91460 SERIES FR60 User Manual

Page 19

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3

Chapter 1 Introduction

2.Instruction for Users

2. Instruction for Users

Clock Controls

By inputting “L” to INIT, ensure clock oscillation stabilization time.

Switching of dual-purpose port

Use PFR (Port function register) to switch between PORT and dual-purpose port.

Low-power-consumption mode

• For standby mode, enable synchronous standby (TBCR.SYNCS=“1”) and then use the following sequences.

In addition, after returning from standby, set I flag, ILM and ICR in order to branch to interrupt handler which
triggered the return.

• If you use monitor debugger, you should avoid the following.

• Do not set breakpoints for command sequence above.

• Do not conduct stepwise execution for command sequence above.

Power-on sequence

Power-on and power-off sequence valid for MB91V460 Rev.A. Please review the datasheets of the flash
devices for a valid power-on and power-off sequence on those devices.

Power-on sequence: (1) VDD5 , VDD35, HVDD5, VDD5R (2) AVCC, AVRH, V0-V3
Power-off sequence: (1) AVCC, AVRH, V0-V3 (2) VDD5 , VDD35, HVDD5, VDD5R

The power supply V3 for LCD must not exceed VDD5. The power-on of V3 should be carried out after power-
on of VDD5R and VDD5. To power on analogue power supply AVCC and analogue signal, power VDD5R and
VDD5 on before.

Power supply operating conditions

Power supply recommendation valid for MB91V460 Rev.A. Please review the datasheets of the flash devices
for a recommendation of the power supply conditions on those devices.

[VDD5 = HVDD5 = AVCC] >= VDD35. This is the recommended condition.

value_of_standby is a write data to STCR

#value_of_standby, R0
#_STCR, R12
R0, @R12
@R12, R0
@R12, R0

_STCR is the STCR address. (481H)
Write to Standby Control Register (STCR).
STCR read for synchronous standby.
Dammy read STCR again.
NOP x 5 for timing adjustment.

(LDI
(LDI
STB
LDUB
LDUB
NOP
NOP
NOP
NOP
NOP