仅对英特尔可见 — GUID: mcn1396007653395
Ixiasoft
7.3. ALTPLL_RECONFIG计数器设置
计数器选择 | 二进制 | 十进制 |
---|---|---|
N | 0000 | 0 |
M | 0001 | 1 |
CP/LF | 0010 | 2 |
VCO | 0011 | 3 |
C0 | 0100 | 4 |
C1 | 0101 | 5 |
C2 | 0110 | 6 |
C3 | 0111 | 7 |
C4 | 1000 | 8 |
非法值 | 1001 | 9 |
非法值 | 1010 | 10 |
非法值 | 1011 | 11 |
非法值 | 1100 | 12 |
非法值 | 1101 | 13 |
非法值 | 1110 | 14 |
非法值 | 1111 | 15 |
计数器类型 | 计数器参数 | 二进制 | 十进制 | 宽度(比特) |
---|---|---|---|---|
普通计数器(C0 - C4) | High count | 000 | 0 | 8 |
Low count | 001 | 1 | 8 | |
Bypass | 100 | 4 | 1 | |
Mode (odd/even division) | 101 | 5 | 1 | |
CP/LF | Charge pump unused | 101 | 5 | 5 |
Charge pump current | 000 | 0 | 3 | |
Loop filter unused | 100 | 4 | 1 | |
Loop filter resistor | 001 | 1 | 5 | |
Loop filter capacitance | 010 | 2 | 2 | |
VCO | VCO post scale | 000 | 0 | 1 |
M/N计数器 | High count | 000 | 0 | 8 |
Low count | 001 | 1 | 8 | |
Bypass | 100 | 4 | 1 | |
Mode (odd/even division) | 101 | 5 | 1 | |
Nominal count | 111 | 7 | 9 |
对于偶数定类计数(even nominal count),按如下自动设置计数器比特:
- high_count = Nominalcount/2
- low_count= Nominalcount/2
对于计数定类计数(odd nominal count),按如下自动设置计数器比特:
- high_count = (Nominalcount + 1)/2
- low_count = Nominalcount - high_count
- odd/even division bit = 1
对于nominal count = 1,bypass bit = 1。