DLPS015G april 2010 – june 2023 DLPA200
PRODUCTION DATA
The SCP is a full duplex, synchronous, character-oriented (byte) port that allows exchange of data between the primary ASIC or FPGA, and one or more secondary DLPA200s (and/or other DLP devices).
SIGNAL | I/O | FROM/TO | TYPE | DESCRIPTION |
---|---|---|---|---|
SCPCK | I | SCP bus primary to secondary | LVTTL compatible | SCP bus serial transfer clock. The host processor (primary) generates this clock. |
SCPEN | I | SCP bus primary to secondary | LVTTL compatible | SCP bus access enable (low true). When high, secondary will reset to idle state, and SCPDO output will tri-state. Pulling SCPEN low initiates a read or write access. SCPEN must remain low for an entire read/write access, and must be pulled high after the last data cycle. To abort a read or write cycle, pull SCPEN high at any point. |
SCPDI | I | SCP bus primary to secondary | LVTTL compatible | SCP bus serial data input. Data bits are valid and must be clocked in on the falling edge of SCPCK. |
SCPDO | O | SCP bus secondary to primary | LVTTL, open drain w/tri-state | SCP bus serial data output. Data bits must clocked out on the rising edge of SCPCK. A 1-kΩ pullup resistor to the 3.3 volt ASIC supply is required. |
IRQ | O | SCP bus secondary to primary | LVTTL, open drain | Not part of the SCP bus definition. Asynchronous interrupt signal from secondary to request service from primary. A 1-kΩ pullup resistor to the 3.3-V ASIC supply is required. |