UR6HCPS2-SP40 Datasheet, PDF (4/22 Pages) Semtech Corporation – Converts PS/2 Data to Serial or SPI

PIN DEFINITIONS, (CON’T)
Pin Numbers
Mnemonic
Configuration Pins
CONF0
CONF1
CONF2
ASI/_SPI_SEL
LQFP Type
32
I
1
I
2
I
3
I
Name and Function
Configuration pin 0; see Note 2
Configuration pin 1; see Note 2
Configuration pin 2; see Note 2
SPI/Serial Selector pin. High:Serial;
Reserved for
LED0
LED1
LED2
LED3
RES0
12
I/O
13
I/O
14
I/O
15
I/O
16
I/O
Reserved LED Driver / GPIO
Reserved LED Driver / GPIO
Reserved LED Driver / GPIO
Reserved LED Driver / GPIO
Reserved GPIO
Note 1: An underscore in front of the pin mnemonic denotes an active low signal.
Note 2: When Asynchronous Serial Interface (ASI) mode is selected, ASI/_SPI_SEL pin is
high and pins CONF2:CONF1:CONF0 select the following Baud Rates:
111: 19200 bps; 110: 9600 bps; 101: 1200 bps; 100: 600 bps; 011: 300 bps
010: 31250 bps; 001: 62500 bps.
When SPI mode is selected, ASI/_SPI_SEL pin is low. If CONF0 is high, the trasnfer sequence
is MSB to LSB, otherwise, LSB to MSB.
Note 3: For ASI/_SPI_SEL pin use the following setting:
1: Asynchronous Serial Mode; 0: Serial Peripheral Interface (SPI) mode
Note 4: In ASI mode, SDATA and SCLK are driven to low after reset. In SPI mode, TXD, RXD,
CONF1 and CONF2 are driven to low after reset. In both ASI and SPI mode, LED0, LED1,
LED2, LED3 and RES0 are configured as inputs with pull-up resistors.
Pin Types Legend: AI=Analog Input; I=Input; O=Output; I/O=Input or Output;
I/nD=Input or Output with N-channel Open Drain driver;
Copyright Semtech, 2002-2001
4
DOC6-PS2-SP40-DS-102
www.semtech.com