MAS3549F datasheet(79/92 Pages) MICRONAS

부품명	MAS3549F

상세설명	MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec

PDF	92 Pages

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79 / 92 page

DATA SHEET

MAS 35x9F

Micronas

June 30, 2004; 6251-505-1DS

4.6.2.7. PIO as Parallel Input Interface:

Program Download Mode

Handshake for PIO input in Program Download

Mode is accomplished through the RTR, PCS, and

PI12..PI19 signal lines (see Fig. 4–29). The PR line

should be set to low level.

The MAS 35x9F will drive RTR low as soon as it is

ready to receive a byte and RTR will stay low until one

byte has been written. Writing of a byte is performed

with a PCS pulse, driven by the microcontroller. The

MAS 35x9F reads data after the falling edge of PCS

and will finish the cycle by setting RTR to high level

after the rising edge of PCS. The next data transfer is

initialized by the MAS 35x9F by driving the RTR line.

Fig. 4–29: PIO program download mode timing

Table 4–11: PIO Program Download Mode timing

Symbol

Min.

Max.

Unit

RTR, PCS

µs

PCS

150

PCS, RTR

030

RTR

0.4

µs

RTW

PIxx

PCS

MAS3549F 데이터시트(PDF) 79 Page - Micronas