参数资料
型号: AD9523-1/PCBZ
厂商: Analog Devices Inc
文件页数: 41/60页
文件大小: 0K
描述: BOARD EVAL FOR AD9523-1
设计资源: AD9523(-1) Eval Board Schematic
AD9523(-1) BOM
AD9523(-1) Gerber Files
标准包装: 1
主要目的: 计时,时钟发生器
嵌入式:
已用 IC / 零件: AD9523
主要属性: 板载 PLL 环路滤波器
次要属性: LED 状态指示器
已供物品:
AD9523-1
Rev. B | Page 46 of 60
Input PLL (PLL1) (Address 0x010 to Address 0x01D)
Table 34. PLL1 REFA R Divider Control
Address
Bits
Bit Name
Description
0x010
[7:0]
REFA R divider
10-bit REFA R divider, Bits[7:0] (LSB). Divide-by-1 to divide-by-1023.
00000000, 00000001: divide-by-1.
0x011
[1:0]
10-bit REFA R divider, Bits[9:8] (MSB).
Table 35. PLL1 REFB R Divider Control1
Address
Bits
Bit Name
Description
0x012
[7:0]
REFB R divider
10-bit REFB R divider, Bits[7:0] (LSB). Divide-by-1 to divide-by-1023.
00000000, 00000001: divide-by-1.
0x013
[1:0]
10-bit REFB R divider, Bits[9:8] (MSB).
1 Requires Register 0x01C, Bit 7 = 1 for division that is independent of REFA division.
Table 36. PLL1 Reference Test Divider
Address
Bits
Bit Name
Description
[7:6]
Reserved
Reserved.
0x014
[5:0]
REF_TEST divider
6-bit reference test divider. Divide-by-1 to divide-by-63.
000000, 000001: divide-by-1.
Table 37. PLL1 Reserved
Address
Bits
Bit Name
Description
0x015
[7:0]
Reserved
Reserved.
Table 38. PLL1 Feedback N Divider Control
Address
Bits
Bit Name
Description
0x016
[7:0]
10-bit feedback divider, Bits[7:0] (LSB). Divide-by-1 to divide-by-1023.
00000000, 00000001: divide-by-1.
0x017
[1:0]
PLL1 feedback N divider control
(N_PLL1)
10-bit feedback divider, Bits[1:0] (MSB).
Table 39. PLL1 Charge Pump Control
Address
Bits
Bit Name
Description
7
PLL1 charge pump tristate
Tristates the PLL1 charge pump.
0x018
[6:0]
PLL1 charge pump control
These bits set the magnitude of the PLL1 charge pump current. Granularity is ~0.5 μA
with a full-scale magnitude of ~63.5 μA.
[7:5]
Reserved
Reserved.
4
Enable SPI control of antibacklash
pulse width
Controls the functionality of Register 0x019, Bits[3:2].
0 (default): the device automatically controls the antibacklash period.
1: antibacklash period defined by Register 0x019, Bits[3:2].
[3:2]
Antibacklash pulse width control
Controls the PFD antibacklash period.
00 (default): minimum.
01: low.
10: high.
11: maximum.
These bits are ineffective unless Register 0x019, Bit 4 = 1.
0x019
[1:0]
PLL1 charge pump mode
Controls the mode of the PLL1 charge pump.
00: tristate.
01: pump up.
10: pump down.
11 (default): normal.
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