Datasheet

AD9547 Data Sheet
Rev. E | Page 70 of 104
Table 47. Nominal System Clock (SYSCLK) Period
1
Address
Bit
Bit Name
Description
0x0103 [7:0] Nominal SYSCLK period
(expressed in fs)
System clock period, Bits[7:0].
0x0104
[7:0]
System clock period, Bits[15:8].
0x0105 [7:5] Unused Unused.
[4:0] Nominal SYSCLK period System clock period, Bits[20:16].
1
Units are femtoseconds (fs). The default value is 0x0F424 = 1,000,000 (1 ns) and implies a system clock frequency of 1 GHz.
Table 48. System Clock Stability Period
1
Address Bit Bit Name Description
0x0106 [7:0] SYSCLK stability period
(expressed in ms)
System clock stability period, Bits[7:0] (default = 0x01).
0x0107 [7:0] System clock stability period, Bits[15:8] (default = 0x00).
0x0108
[7:4]
Unused
Unused.
[3:0]
SYSCLK stability period
System clock stability period, Bits[19:16] (default = 0x0)
(default period = 0x00001, or 1 ms).
1
Units are milliseconds (ms). The default value is 0x00001 = 1 (1 ms).
GENERAL CONFIGURATION (REGISTER 0x0200 TO REGISTER 0x0214)
Register 0x0200 to Register 0x0207—Multifunction Pin Control (M0 to M7)
Table 49. Multifunction Pin (M0 to M7) Control
1
Address
Bit
Bit Name
Description
0x0200
7
M0 in/out
In/out control for the M0 pin.
0 (default) = input (control pin).
1 = output (status pin).
[6:0]
M0 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0201 7 M1 in/out In/out control for the M1 pin (same as M0).
[6:0] M1 function See Table 25 and Table 26 (default = 0xb0000000).
0x0202
7
M2 in/out
In/out control for the M2 pin (same as M0).
[6:0]
M2 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0203 7 M3 in/out In/out control for the M3 pin (same as M0).
[6:0]
M3 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0204 7 M4 in/out In/out control for the M4 pin (same as M0).
[6:0]
M4 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0205 7 M5 in/out In/out control for the M5 pin (same as M0).
[6:0]
M5 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0206 7 M6 in/out In/out control for the M6 pin (same as M0).
[6:0]
M6 function
See Table 25 and Table 26 (default = 0xb0000000).
0x0207 7 M7 in/out In/out control for the M7 pin (same as M0).
[6:0] M7 function See Table 25 and Table 26 (default = 0xb0000000).
1
The default setting for all the multifunction pins is as an unused control input pin.
Table 50. IRQ Pin Output Mode
Address Bit Bit Name Description
0x0208 [7:2] Unused Unused.
[1:0]
IRQ pin output mode
Select the output mode of the IRQ pin.
00 (default) = NMOS, open drain (requires an external pull-up resistor).
01 = PMOS, open drain (requires an external pull-down resistor).
10 = CMOS, active high.
11 = CMOS, active low.