37
Rev NR
Feature Register - Local Offset 0xFC (0x00197AF4)
D31:D21
Unused
D20
1
- Rx Status byte inserted in FIFO
D19:D18
Timestamp
01 = single external clock
10
= single internal clock
D17:D16
FPGA Reprogram field
01
= Present
00 = Not Present
D15:D14
Configurable FIFO space
01
- Rx/Tx select. Up to 32k deep FIFOs
D13
1
= FIFO Test Bit
D12
1
= FW Type Reg
D11:D8
FW Feature Level (Set at common code level)
0x01 = RS232 support, Pin Source Change
0x02 = Multi-Protocol support
0x03 = Common Internal/External FIFO Support
0x04 = FIFO Latched Underrun/Overrun/Level
0x05 = Demand mode DMA Single Cycle for Tx
0x06 = DMA_Single_Cycle_Dis, updated Pin_Src
0x07 = Rx Underrun Only, Reset Status
0x08 = Clock to 50Hz with 10Hz resolution
0x09 = No Legacy Support (No Clock Control Register)
0x0A
= Falling Int fix
D7
1
= DMA Single Cycle Disable
D6
1
= Board Reset, FIFO present bits
D5
1
= FIFO Size/Counters present
D4
1
= FW ID complies with this standard
D3:D0
Clock Oscillator
0x0 = Fixed
0x1 = ICD2053B (1 Osc)
0x2 = ICD2053B (4 Osc)
0x3 = CY22393 (4 Osc)
0x4
= 2 x CY22393 (6 Osc)