P89LPC938FDH NXP Semiconductors, P89LPC938FDH Datasheet - Page 47

• Manufacturer Part Number: P89LPC938FDH
• Description: MCU 8BIT 80C51 8K FLASH, TSSOP28
• Manufacturer: NXP Semiconductors

Specifications of P89LPC938FDH

• Controller Family/series: (8051) 8052
• Core Size: 8bit
• No. Of I/o's: 26
• Program Memory Size: 8KB
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 18MHz
• Oscillator Type: External,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Philips Semiconductors
9397 750 14051
Product data sheet
8.4.1 Fixed channel, single conversion mode
8.4.2 Fixed channel, continuous conversion mode
8.4.3 Auto scan, single conversion mode
8.4.4 Auto scan, continuous conversion mode
8.3 Block diagram
8.4 A/D operating modes
A single input channel can be selected for conversion. A single conversion will be
performed and the result placed in the result register pair which corresponds to the
selected input channel. An interrupt, if enabled, will be generated after the conversion
completes.
A single input channel can be selected for continuous conversion. The results of the
conversions will be sequentially placed in the eight result register pairs. The user may
select whether an interrupt can be generated after every four or every eight conversions.
Additional conversion results will again cycle through the result register pairs, overwriting
the previous results. Continuous conversions continue until terminated by the user.
Any combination of the eight input channels can be selected for conversion. A single
conversion of each selected input will be performed and the result placed in the result
register pair which corresponds to the selected input channel. The user may select
whether an interrupt, if enabled, will be generated after either the first four conversions
have occurred or all selected channels have been converted. If the user selects to
generate an interrupt after the four input channels have been converted, a second
interrupt will be generated after the remaining input channels have been converted. If only
a single channel is selected this is equivalent to single channel, single conversion mode.
Any combination of the eight input channels can be selected for conversion. A conversion
of each selected input will be performed and the result placed in the result register pair
which corresponds to the selected input channel.The user may select whether an
interrupt, if enabled, will be generated after either the first four conversions have occurred
or all selected channels have been converted. If the user selects to generate an interrupt
after the four input channels have been converted, a second interrupt will be generated
Fig 21. A/D converter block diagram.
INPUT
MUX
Rev. 01 — 25 February 2005
comp
+
–
8-bit microcontroller with 10-bit A/D converter
DAC1
CCLK
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
SAR
8
P89LPC938
CONTROL
LOGIC
002aab103
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