P89LPC931A1FDH,512 NXP Semiconductors, P89LPC931A1FDH,512 Datasheet - Page 25

• Manufacturer Part Number: P89LPC931A1FDH,512
• Description: IC 80C51 MCU FLASH 8K 28-TSSOP
• Manufacturer: NXP Semiconductors
• Series: LPC900r

Specifications of P89LPC931A1FDH,512

• Program Memory Type: FLASH
• Program Memory Size: 8KB (8K x 8)
• Package / Case: 28-TSSOP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 18MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 26
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: P89LPC
• Core: 80C51
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 18 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 568-1758 - BOARD EVAL FOR LPC93X MCU FAMILY
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 935288634512

NXP Semiconductors
P89LPC9301_931A1
Product data sheet
7.17.1 Brownout detection
7.17.2 Power-on detection
7.18.1 Idle mode
7.18.2 Power-down mode
7.18 Power reduction modes
The brownout detect function determines if the power supply voltage drops below a
certain level. Enhanced brownout detection has 3 independent functions: BOD reset,
BOD interrupt and BOD FLASH.
BOD reset is always on except in total Power-down mode. It could not be disabled in
software. BOD interrupt may be enabled or disabled in software. BOD FLASH is always
on, except in Power-down modes and could not be disabled in software.
BOD reset and BOD interrupt, each has four trip voltage levels. BOE1 bit (UCFG1.5) and
BOE0 bit (UCFG1.3) are used as trip point configuration bits of BOD reset. BOICFG1 bit
and BOICFG0 bit in register BODCFG are used as trip point configuration bits of BOD
interrupt. BOD reset voltage should be lower than BOD interrupt trip point. BOD FLASH is
used for flash programming/erase protection and has only 1 trip voltage of 2.4 V. Please
refer to P89LPC9301/931A1 User manual for detail configurations.
If brownout detection is enabled the brownout condition occurs when V
brownout trip voltage and is negated when V
For correct activation of brownout detect, the V
Please see
The Power-on detect has a function similar to the brownout detect, but is designed to work
as power comes up initially, before the power supply voltage reaches a level where
brownout detect can work. The POF flag in the RSTSRC register is set to indicate an
initial power-up condition. The POF flag will remain set until cleared by software.
The P89LPC9301/931A1 supports three different power reduction modes. These modes
are Idle mode, Power-down mode, and total Power-down mode.
Idle mode leaves peripherals running in order to allow them to activate the processor
when an interrupt is generated. Any enabled interrupt source or reset may terminate Idle
mode.
The Power-down mode stops the oscillator in order to minimize power consumption. The
P89LPC9301/931A1 exits Power-down mode via any reset, or certain interrupts. In
Power-down mode, the power supply voltage may be reduced to the data retention supply
voltage V
entered. SFR contents are not guaranteed after V
it is highly recommended to wake-up the processor via reset in this case. V
raised to within the operating range before the Power-down mode is exited.
Some chip functions continue to operate and draw power during Power-down mode,
increasing the total power used during power-down. These include: Brownout detect,
watchdog timer, comparators (note that comparators can be powered down separately),
and RTC/system timer. The internal RC oscillator is disabled unless both the RC oscillator
has been selected as the system clock and the RTC is enabled.
DDR
Table 10 “Static characteristics”
. This retains the RAM contents at the point where Power-down mode was
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 29 November 2010
8-bit microcontroller with accelerated two-clock 80C51 core
for specifications.
DD
DD
P89LPC9301/931A1
rises above the brownout trip voltage.
DD
rise and fall times must be observed.
has been lowered to V
DD
© NXP B.V. 2010. All rights reserved.
falls below the
DDR
DD
must be
, therefore
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