UPD75518 NEC, UPD75518 Datasheet - Page 122

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

122
(6) Notes on the standby mode
The A/D converter operates with the main system clock. So its operation stops in the STOP mode, or when
the subsystem clock is used, in the HALT mode. A current flows through the AV
A/D converter is stopped, so that the current must be stopped to reduce overall system power consump-
tion. Since the P113 pin has a higher drive capability than the other ports, it can supply voltage to the
AV
In this case, however, the actual AV
resulting from conversion does not provide precision and can be used only for relative comparison. In
the standby mode, outputting a low on the P113 can reduce power consumption.
Note The drive capability of P-ch is higher than that of other ports.
REF
pin directly.
Fig. 4-61 Reducing Power Consumption in the Standby Mode
AV
REF
P113
AV
AV
. .
= V
REF
REF
SS
DD
voltage does not provide precision. This means that the value
P-ch
Note
V
DD
PD75518(A)
REF
pin even when the
PD75518(A)