ISL5217_05 Datasheet, PDF (33/43 Pages) Intersil Corporation – Quad Programmable Up Converter

ISL5217
BIT
15
14
13:10
9:8
7:6
5:4
3:2
1:0
TABLE 33. SERIAL CONTROL (13:0)
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x11
FUNCTION
DESCRIPTION
Serial/parallel Data
Select
Selects the source of the symbol data for input.
0 = µP port, (parallel interface)
1 = serial port, (one of four serial ports)
Epoch Frame Strobe
Enable
Selects a pre-carry out of the fixed integer divider instead of the serial frame strobe. The pre-carry out is
six clocks ahead of the true carry out. This strobe is used to synchronize fixed integer dividers on other
devices.
0 = serial frame strobe.
1 = epoch frame strobe.
Serial Clock Rate (3:0)
Clock divider to generate 1 of 16 serial clock rates
0000 = clk/2
1101 = clk/28
0001 = clk/4
1110 = clk/30
0010 = clk/6
1111 = clk/32
Serial Clock Mode (1:0)
Selects the source for serial TX clock output.
00 = Disables serial clock divider and serial clock out.
01 = Select 1x clock rate.
10 = Select divided clock rate.
11 = Select 32x sample clock rate.
Select TX Enable (1:0)
Selects the TX enable port. The rising edge flushes data, (16 clks) and updates configuration slave
registers as determined by the update mask. High level allows serial requests to occur. Low level inhibits
additional serial data requests, (assertion of TX frame strobe).
00 = TX enable A.
01 = TX enable B.
10 = TX enable C.
11 = TX enable D.
Select Update(1:0)
Selects the Update port. The Update strobe is used to update all slave configuration registers as
determined by the update mask.
00 = Update A.
01 = Update B.
10 = Update C.
11 = Update D.
Serial Word Length (1:0)
Selects the word length of the incoming serial data The value is for one data word and is the same for
both I and Q data.
00 = 16 bits.
01 = 12 bits.
10 = 8 bits.
11 = 4 bits.
Select Serial Data in (1:0) Selects the serial data in port.
00 = Serial data A.
01 = Serial data B.
10 = Serial data C.
11 = Serial data D.
BIT
15:10
9:0
FUNCTION
Reserved
I Time Slot(9:0)
TABLE 34. I - SERIAL TIME SLOT
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x12
DESCRIPTION
Not Used.
The I - SERIAL TIME SLOT is a 10 bit counter clocked at the serial clock rate. The counter begins on
assertion of the Frame strobe. The carryout determines when a valid I symbol has been shifted in.
BIT
15:10
9:0
FUNCTION
Reserved
Q Time Slot (9:0)
TABLE 35. Q - SERIAL TIME SLOT
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x13
DESCRIPTION
Not Used.
The Q - SERIAL TIME SLOT is a 10 bit counter clocked at the serial clock rate. The counter begins on
assertion of the Frame strobe. The carryout determines when a valid Q symbol has been shifted in.
33
FN6004.3
July 8, 2005