P89LPC931FDH,112 NXP Semiconductors, P89LPC931FDH,112 Datasheet - Page 22

• Manufacturer Part Number: P89LPC931FDH,112
• Description: IC 80C51 MCU FLASH 8K 28-TSSOP
• Manufacturer: NXP Semiconductors
• Series: LPC900r

Specifications of P89LPC931FDH,112

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-TSSOP
• Processor Series: P89LPC9x
• 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: 26
• Number Of Timers: 2
• 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: - 45 C
• For Use With: 622-1014 - BOARD FOR LPC9XX TSSOP622-1008 - BOARD FOR LPC9103 10-HVSON622-1006 - SOCKET ADAPTER BOARDMCB900K - BOARD PROTOTYPE NXP 89LPC9EPM900K - EMULATOR/PROGRAMMER NXP P89LPC9568-4000 - DEMO BOARD SPI/I2C TO DUAL UART568-3510 - DEMO BOARD SPI/I2C TO UART622-1002 - USB IN-CIRCUIT PROG LPC9XX568-1759 - EMULATOR DEBUGGER/PROGRMMR LPC9X568-1758 - BOARD EVAL FOR LPC93X MCU FAMILY
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-1284-5; 935273877112; P89LPC931FDH; P89LPC931FDH,129; P89LPC931FDH-S

Philips Semiconductors
9397 750 14472
Product data
8.11.1 Port configurations
8.11.2 Quasi-bidirectional output configuration
8.11.3 Open-drain output configuration
8.11.4 Input-only configuration
8.11.5 Push-pull output configuration
8.11.6 Port 0 analog functions
All but three I/O port pins on the P89LPC930/931 may be configured by software to
one of four types on a bit-by-bit basis. These are: quasi-bidirectional (standard 80C51
port outputs), push-pull, open drain, and input-only. Two configuration registers for
each port select the output type for each port pin.
P1.5 (RST) can only be an input and cannot be configured.
P1.2 (SCL/T0) and P1.3 (SDA/INT0) may only be configured to be either input-only or
open-drain.
Quasi-bidirectional outputs can be used as both an input and output without the need
to reconfigure the port. This is possible because when the port outputs a logic HIGH,
it is weakly driven, allowing an external device to pull the pin LOW. When the pin is
driven LOW, it is driven strongly and able to sink a fairly large current. These features
are somewhat similar to an open-drain output except that there are three pull-up
transistors in the quasi-bidirectional output that serve different purposes.
The P89LPC930/931 is a 3 V device, but the pins are 5 V-tolerant. In
quasi-bidirectional mode, if a user applies 5 V on the pin, there will be a current
flowing from the pin to V
5 V in quasi-bidirectional mode is discouraged.
A quasi-bidirectional port pin has a Schmitt-triggered input that also has a glitch
suppression circuit.
The open-drain output configuration turns off all pull-ups and only drives the
pull-down transistor of the port driver when the port latch contains a logic ‘0’. To be
used as a logic output, a port configured in this manner must have an external
pull-up, typically a resistor tied to V
An open-drain port pin has a Schmitt-triggered input that also has a glitch
suppression circuit.
The input-only port configuration has no output drivers. It is a Schmitt-triggered input
that also has a glitch suppression circuit.
The push-pull output configuration has the same pull-down structure as both the
open-drain and the quasi-bidirectional output modes, but provides a continuous
strong pull-up when the port latch contains a logic ‘1’. The push-pull mode may be
used when more source current is needed from a port output. A push-pull port pin
has a Schmitt-triggered input that also has a glitch suppression circuit.
The P89LPC930/931 incorporates two Analog Comparators. In order to give the best
analog function performance and to minimize power consumption, pins that are being
used for analog functions must have the digital outputs and digital inputs disabled.
Rev. 05 — 15 December 2004
DD
, causing extra power consumption. Therefore, applying
8-bit microcontrollers with two-clock 80C51 core
DD
.
P89LPC930/931
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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