ISL59530_0708 Datasheet, PDF (19/25 Pages) Intersil Corporation – 16x16 Video Crosspoint

Serial Timing Diagram
SLATCH
ISL59530
SLATCH falling edge timing/placement is a “don’t care.”
Serial data is latched only on rising edge of SLATCH.
t
t_SL
SCLK
SDI
t_HD
t_SD
B0
(LSB)
B1
B2
t_w
B15
(MSB)
SDO
B0
B1
B2
(PREVIOUS))(PREVIOUS) (PREVIOUS)
B15
B0
(PREVIOUS) (LSB)
B1
B2
SDO = SDI delayed by 15.5 SCLKs to allow daisy-chaining of multiple ISL59530s. SDO changes on the falling edge of SCLK.
TABLE 1. SERIAL TIMING PARAMETERS
PARAMETER
RECOMMENDED OPERATING RANGE
DESCRIPTION
t
≥200ns
SCLK period
t_W
0.50*t
Clock Pulse Width
t_SD
≥20ns
Data Setup Time
t_HD
≥20ns
Data Hold Time
t_SL
≥20ns
Final SLCK rising edge (latching B15) to SLATCH rising edge
Programming Model
The ISL59530 is configured by a series of 16-bit serial control words. The three MSBs (B15 through B13) of each serial word
determine the basic command:
TABLE 2. COMMAND FORMAT
B15 B14 B13
COMMAND
NUMBER OF WRITES
0
0
0 INPUT/OUTPUT: Maps input channels to output channels
16 (1 channel per write)
0
0
1 OUTPUT ENABLE: Output enable for individual channels
4 (4 channels per write)
0
1
0 GAIN SET: Gain (x1 or x2) for each channel
4 (4 channels per write)
0
1
1 BROADCAST: Enables broadcast mode and selects the input channel to be
1
broadcast to all output channels
1
1
1 CONTROL: Clamp on/off, operational/standby mode, and global output
1
enable/disable
Mapping Inputs to Outputs
Inputs are mapped to their desired outputs using the input/output control word. Its format is:
TABLE 3. INPUT/OUTPUT WORD
B15 B14 B13 B12 B11 B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
0
0
0
I₃
I₂
I₁
I₀
0
0
0
0
O₃
O₂
O₁
O₀
0
I₃:I₀ form the 4-bit word indicating the input channel (0 to 15), and O₃:O₀ determine the output channel which that input channel
will map to. One input can be mapped to one or multiple outputs. To fully program the ISL59530, 16 INPUT/OUTPUT words must
be transmitted - one for each input channel.
Note: Broadcast Mode must be disabled when configuring input/output mapping. INPUT/OUTPUT words transmitted while in
Broadcast Mode will not be processed correctly and result in corrupt channel mapping when Broadcast Mode is disabled.
19
FN6220.6
August 29, 2007