| 摘要 |
PURPOSE:To ensure a sure test for multi-port RAM by changing the position values of (n) pieces of bits of an address register for each port. CONSTITUTION:When the value of the lowest order bit of an address register 1-0 in a port 0 is set at 0, the address 0, 2, 4- are allocated to the side of the port 0. When the lowest order bit of an address register 1-1 is fixed at 1, the addresses 1, 3, 5- are allocated to the side of the port 1. Under such conditions, the tests are started at both ports 0 and 1. Thus different test patterns are given from both ports for each port with bits kept fixed. As a result, even the interference occurring between bits can also be checked on a memory plane.
|
