UPD30121 NEC [NEC], UPD30121 Datasheet - Page 11

• Manufacturer Part Number: UPD30121
• Description: VR4121TM 64-/32-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

MPOWER
POWERON
POWER
RSTSW#
RTCRST#
BATTINH/
BATTINT#
(3) Battery monitor interface signals
(4) Initialization interface signals
Signal
Signal
I/O
I/O
O
O
I
I
I
I
This function differs depending on how the MPOWER signal is set.
<When MPOWER signal = 0>
BATTINH function
<When MPOWER signal = 1>
BATTINT# function
This signal indicates the V
This signal indicates the V
detected and becomes inactive when the BATTINH/BATTINT# signal check operation is completed.
This is a V
This is a V
This signal resets RTC. When power is first supplied to a device, the external agent must assert the
signal at this pin for about 2 s.
This signal enables/prohibits activation due to power-on.
1 : Enable activation
0 : Prohibit activation
This is an interrupt signal that is output when remaining power is low during normal operations. The
external agent checks the remaining battery power. Activate the signal at this pin if voltage sufficient
for operations cannot be supplied.
R
R
4121 activation signal.
4121 reset signal.
R
R
Data Sheet U14691EJ1V0DS00
4121 is operating. This signal is inactive during Hibernate mode.
4121 is ready to operate. It becomes active when a power-on factor is
Function
Function
PD30121
11