D75108CW NEC, D75108CW Datasheet - Page 31

• Manufacturer Part Number: D75108CW
• Description: Search -----> UPD75108CW
• Manufacturer: NEC

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8.
can be used in three ways by specifying a mask option through SWA and SWB shown in Fig. 8-1. (Refer to 11. MASK
OPTION SELECTION.)
8-2 and 8-3, respectively.
The reset ( RES ) signal generator circuit is configured as shown in Figure 8-1.
The Power-ON reset generator circuit generates an internal reset signal when the supply voltage rises. This pulse
*: The wait time does not include the time required after the RES signal has been generated until the
The reset operations performed by the Power-On reset circuit and the RESET input signal are illustrated in Figs.
RESET FUNCTION
oscillation starts.
Supply voltage
Internal reset signal
(RES)
RESET
*: PONF cannot be set to 1 by SET1 instruction.
0 V
Power-ON
reset
generator
circuit
Fig. 8-2 Reset by Power-ON Reset Circuit
Fig. 8-1 Reset Signal Generator Circuit
SWA
Internal reset operation
SWB
(approx. 31.3 ms: 4.19 MHz)
Power-ON
flag (PONF)
HALT mode
Wait*
Internal reset signal
(RES)
PD75104, 75106, 75108
Execution of bit
manipulation
instruction*
Operation mode
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