E7804BHF Semtech, E7804BHF Datasheet - Page 12

• Manufacturer Part Number: E7804BHF
• Manufacturer: Semtech

Specifications of E7804BHF

• Operating Temperature (max): 100C
• Package Type: MQFP
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

Figure 5 depicts the conclusion of a Read instruction being
written to the Edge7804. The first LOAD pulse straddling
the rising edge of CLKIN latches in the Read instruction,
echoing at SDOUT stops, and the readback of the register
begins. After 24 low-going clocks, the data at SDOUT
resumes echoing the written data at SDIN. Even without
the second LOAD pulse, the echoing will begin. Figure 5
depicts a Write instruction following the Read. This could
be another Read instruction, in which case the echoing
of SDIN would not begin as indicated. Instead, another
sequence of 24 readback bits would begin.
The readback data format and address are defined in
Table 3. The Read operation will continue for 24 low-
going clock edges. The SDOUT will begin outputting data
from the write shift register after the 24
edge.
TEST AND MEASUREMENT PRODUCTS
Circuit Description (continued)
2005 Semtech Corp. / Rev. 5, 12/6/05
DIGITAL
ASIC
a. Minimum # of Control Lines from ASIC
LOADOUT
CLKOUT
SOUT
SIN
Figure 4. Serial Control of Multiple Edge7804s
th
low-going clock
CLKIN
CLKIN
CLKIN
LOAD
LOAD
LOAD
E7804
E7804
E7804
SDOUT
SDOUT
SDOUT
SDIN
SDIN
SDIN
#1
#2
"N"
12
Address Map
Table 2 shows the Write Table and Address Map. Across
the top of the table are the 24 bits of data denoted as Bit
#0 through Bit #23. Hex notation is also provided as
well as the binary positions.
The instruction is constructed of 13 Data bits, 8 address
bits, 2 select bits and a read bit. Figure 3 shows the bit
pattern in the write instructions. The instructions are
separated into 3 main groups. The Chip Functions, the
Channel Functions and the Set Functions. Each instruction
has a Register Name associated with it. In the pages
following Table 2 are descriptions of each of the register
names and, where applicable, a bit-by-bit description of
the data.
DIGITAL
b. Independent Control of Each E7804
ASIC
SOUT"N"
LOAD"N"
CLKOUT
SOUT1
LOAD1
SOUT2
LOAD2
SIN"N"
SIN1
SIN2
CLKIN
LOAD
CLKIN
LOAD
CLKIN
LOAD
E7804
E7804
E7804
SDOUT
SDOUT
SDOUT
SDIN
SDIN
SDIN
#1
#2
"N"
Edge7804
PRELIMINARY
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