User guide

24 CY3687 MoBL-USB FX2LP18 Development Kit User Guide, Doc. # 001-68582 Rev. *B

Development Board

3.6 ATA Connector P7

Table 3-10 shows the pinout for P7, a 40-pin connector that interfaces with a standard ATA cable.

Note This is for ATA use only. SP1, 2, 3, and 4 should be bridged with solder to connect the appro-

priate pull-up or pull-down resistors required for ATA. An 80-pin cable is required for UDMA transfer

modes and recommended for all transfer modes.

3.7 I

C Expanders

U2 and U4 are Philips PCF8574 I/O expanders. They connect to the I

C bus SCL and SDA pins, and

provide eight general-purpose input-output pins. U4 provides eight output bits, connected to the

seven-segment readout U1. U2 provides eight input bits, four of which connect to push buttons S1-

S4, and four of which are available for your use. U4 connects to the 7-segment readout (U1) using

the following bit assignments.

Table 3-10. ATA Connector Pinout

P7 (ATA)

RESET# PA7 1 2 GND GND

DD7 PB7 3 4 PD0 DD8

DD6 PB6 5 6 PD1 DD9

DD5 PB5 7 8 PD2 DD10

DD4 PB4 9 10 PD3 DD11

DD3 PB3 11 12 PD4 DD12

DD2 PB2 13 14 PD5 DD13

DD1 PB1 15 16 PD6 DD14

DD0 PB0 17 18 PD7 DD15

GND GND 19 20 N.C. KEYPIN

DMARQ RDY1 21 22 GND GND

DIOW# CTL0 23 24 GND GND

DIOR# CTL1 25 26 GND GND

IORDY RDY0 27 28 GND CSEL

DMACK# CTL2 29 30 GND GND

INTRQ PA0 31 32 N.C. RESERVED

DA1 PA2 33 34 N.C. PDIAG#

DA0 PA1 35 36 PA3 DA2

CS0# PA4 37 38 PA5 CS1#

DASP# 10K Pull-up 39 40 GND GND