Rainbow Electronics DS3134 - Manual (Page 170)

DS3134
170 of 203
1011 = bus transaction is defined as 11 LCLK periods
1100 = illegal state
1101 = illegal state
1110 = illegal state
1111 = illegal state
Bit 6 / Local Bus Width (LBW).
0 = 16 bits
1 = 8 bits
Bits 8 to 11 / Local Bus Arbitration Timer Setting (LAT0 to LAT3). These 4 bits determine the total
time the Local Bus will seize the bus when it has been granted in the Arbitration Mode (LARBE = 1).
This period is measured from LHLDA(LBG*) being detected to LBGACK* inactive.
33 MHz 25 MHz
0000 = when granted, hold the bus for 32 LCLKs 0.97 us 1.3 us
0001 = when granted, hold the bus for 64 LCLKs 1.9 us 2.6 us
0010 = when granted, hold the bus for 128 LCLKs 3.9 us 5.1 us
0011 = when granted, hold the bus for 256 LCLKs 7.8 us 10.2 us
0100 = when granted, hold the bus for 512 LCLKs 15.5 us 20.5 us
1101 = when granted, hold the bus for 262144 LCLKs 7.9 ms 10.5 ms
1110 = when granted, hold the bus for 524288 LCLKs 15.9 ms 21.0 ms
1111 = when granted, hold the bus for 1048576 LCLKs 31.8 ms 41.9 ms