ISL5217_05 Datasheet, PDF (39/43 Pages) Intersil Corporation – Quad Programmable Up Converter

ISL5217
BIT
FUNCTION
7
Sync Out Polarity
TABLE 45. DEVICE CONTROL (Continued)
TYPE: DEVICE CONTROL DIRECT, ADDRESS: 0x78
DESCRIPTION
Sync out polarity
0 = defines a sync assertion as a transition from a logic low to a logic high.
1 = defines a sync assertion as a transition from a logic high to a logic low.
0=
1=
6
Output Enable
5
I Strobe Enable
4
I Strobe Polarity
Enables data out of the device. Zeroes the data when low.
Indicates when I data is output in the muxed I/Q mode.
I strobe polarity.
0 = defines a sync assertion as a transition from a logic low to a logic high. (I out when low)
1 = defines a sync assertion as a transition from a logic high to a logic low. (I out when high)
0= _{I Q I} 1= _{Q I Q}
3
Cascade Input Enable Enables I and Q cascade data into the device. Zeroes the input buses when low. Set to zero when using
any mode other than Cascade.
2:1
Cascade Delay (1:0)
Delays the 4 Ch sum to align with the cascade input summer. A cascade of 4 devices is supported.
00 = No Delay for master.
01 = Delay for first slave.
10 = Delay for second slave.
11 = Delay for last slave.
0
Broadcast
Enables all four channels to receive current µP write access.
NOTES:
37. There is also a complex output mode available for 4-ch summers 1 and 3 when the cascade feature is not required. This is accomplished by
setting the output mode to 0x01 in the top control register and selecting the complex output mode in the main control register of channel 0 or
channel 2. This mode allows I and Q data to be clocked out in parallel at the full rate. Refer to the Main Control register for further detail.
38. The cascade input of the first device in a cascade chain must be disabled.
TABLE 46. DEVICE OUTPUT ROUTING
TYPE: DEVICE CONTROL DIRECT, ADDRESS: 0x79
BIT
FUNCTION
DESCRIPTION
OUTPUT MODE
COMPLEX COMPLEX COMPLEX
CASCADE
1
2
3
REAL,
IMAG, or
MUXED
15 Channel 3 Routing Routes channel 3 output to output summer 4.
X
X
14 Channel 3 Routing Routes channel 3 output to output summer 3.
X
X
X
X
13 Channel 3 Routing Routes channel 3 output to output summer 2.
X
X
12 Channel 3 Routing Routes channel 3 output to output summer 1.
X
X
X
X
X
11 Channel 2 Routing Routes channel 2 output to output summer 4.
X
X
10 Channel 2 Routing Routes channel 2 output to output summer 3.
X
X
X
X
9 Channel 2 Routing Routes channel 2 output to output summer 2.
X
X
8 Channel 2 Routing Routes channel 2 output to output summer 1.
X
X
X
X
X
7 Channel 1 Routing Routes channel 1 output to output summer 4.
X
X
6 Channel 1 Routing Routes channel 1 output to output summer 3
X
X
X
X
5 Channel 1 Routing Routes channel 1 output to output summer 2
X
X
4 Channel 1 Routing Routes channel 1 output to output summer 1
X
X
X
X
X
3 Channel 0 Routing Routes channel 0 output to output summer 4
X
X
39
FN6004.3
July 8, 2005