2.5
Socket Installation
This chapter describes the user configurable sockets which are visible in the placement plan.
2.5.1
Memory
The VP7 offers two sockets for 168-pin compatible memory modules called SDRAM DIMMs. These
sockets are U1400 and U1401. The VP7 supports Parity and ECC (Error Detection and Correction)
when using 72-bit wide (ECC-) SDRAM DIMMs.
The VP7 requires using SDRAM DIMMs with access time of 8 ns or faster compliant to PC100
specification.
2.5.2
Serial Port Configuration for COM1 and COM2
The serial ports COM1 and COM2 are user configurable for either RS232 or RS422 operation.
Operation mode is selected by installing the appropriate transceiver in the corresponding socket.
COM1 RS232 COM1 RS422 COM2 RS232 COM2 RS422
U2320
X
U2330
X
U2370
X
U2380
X
U2320, U2370 = SN75C185
U2330, U2380 = SN75C1167
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