Datasheet LTC4332 (Analog Devices) - 7

link to page 15 link to page 15 LTC4332
PIN FUNCTIONS SS2 (Pin 12):
Remote Slave Select 2 (Active Low). When
SPEED2 (Pin 15):
Link and Interface Timing Select 2. in local mode, SS2 is an input. Set SS2 low to initiate a SPEED2 is a 3-State input and in conjunction with SPEED1 remote SPI transfer using pins SCK, MOSI, and MISO. selects link baud rate and the remote SCK timing parame- When in remote mode, SS2 is an output and can be con- ters. Set to high, low, or float as defined in Table 2. nected to a remote SPI device’s slave or chip select input.
GND (Pin 16, 21):
Connect to GND. SS2 must be set high when the SPI bus is idle. SS2 is weakly pulled to VL and can be unconnected if not used.
Link (Referenced to GND and VCC) SS3 (Pin 13):
Remote Slave Select 3 (Active Low). When
Y (Pin 17):
Non-inverting Link Driver Output. Connect to in local mode, SS3 is an input. Set SS3 low to initiate a the A pin of a second LTC4332 device set to the opposite remote SPI transfer using pins SCK, MOSI, and MISO. mode. When in remote mode, SS3 is an output and can be con- nected to a remote SPI device’s slave or chip select input.
Z (Pin 18):
Inverting Link Driver Output. Connect to the B SS3 must be set high when the SPI bus is idle. SS3 is pin of a second LTC4332 device set to the opposite mode. weakly pulled to VL and can be unconnected if not used.
B (Pin 19):
Inverting Link Receiver Input. Connect to the
SPEED1 (Pin 14):
Link and Interface Timing Select 1. Z pin of the second LTC4332 device set to the opposite SPEED1 is a 3-State input and in conjunction with SPEED2 mode. selects link baud rate and the remote SCK timing parame-
A (Pin 20):
Non-inverting Link Receiver Input. Connect ters. Set to high, low, or float as defined in Table 2. to the Y pin of the second LTC4332 device set to the opposite mode. Rev. A For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Switching Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Timing Diagram Applications Information Package Description Typical Application Related Parts