LPC2888 datasheet(21/43 Pages) NXP

21 / 43 page

LPC2880_LPC2888_3

Preliminary data sheet

Rev. 03 — 17 April 2008

21 of 43

NXP Semiconductors

LPC2880; LPC2888

16/32-bit ARM microcontrollers with external memory interface

• Serial clock synchronization allows devices with different bit rates to communicate via

one serial bus.

• Serial clock synchronization can be used as a handshake mechanism to suspend and

resume serial transfer.

• Supports normal (100 kHz) and fast (400 kHz) operation.

6.16 10-bit ADC

The LPC2880/2888 contains a single 10-bit successive approximation ADC with ﬁve

multiplexed channels.

6.16.1 Features

• 10-bit successive approximation ADC.

• Input multiplexing among 5 pins.

• Power-down mode.

• Measurement range 0 V to 3.3 V.

• 10-bit conversion time

≥ 2.44 µs.

• Single or continuous conversion mode.

6.17 Analog I/O

The analog I/O system includes an I2S-bus input channel, an I2S-bus output channel, a

dual ADC, and a dual DAC. Each channel includes a separate 4-sample FIFO.

Each of the two ADC inputs is connected to a Programmable Gain Ampliﬁer (PGA).

Each DAC has two output pins.

6.17.1 Features

• I2S-bus input channel with a 4-sample FIFO for stereo DAI.

• I2S-bus output channel with a 4-sample FIFO for stereo DAO.

• Dual 16-bit ADCs with individual inputs routed through programmable gain ampliﬁers.

Input takes place through a 4-sample FIFO.

• Dual 16-bit DACs. Each DAC has its own output pin. Output takes place through a

4-sample FIFO.

6.18 USB 2.0 Hi-Speed device controller

The USB is a 4-wire bus that supports communication between a host and a number (127

maximum) of peripherals. The host controller allocates the USB bandwidth to attached

devices through a token based protocol. The bus supports hot plugging, un-plugging and

dynamic conﬁguration of the devices. All transactions are initiated by the host controller.

The host schedules transactions in 1 ms frames. Each frame contains an SOF marker and

transactions that transfer data to/from device endpoints. There are four types of transfers

deﬁned for the endpoints. Control transfers are used to conﬁgure the device. Interrupt

transfers are used for periodic data transfer. Bulk transfers are used when rate of transfer

is not critical. Isochronous transfers have guaranteed delivery time but no error correction.

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