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LM2507SQ Folha de dados(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM2507SQ
Descrição Electrónicos  Low Power Mobile Pixel Link (MPL) Level 0, 16-bit CPU Display interface Serializer and Deserializer
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2507SQ Folha de dados(HTML) 8 Page - National Semiconductor (TI)

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Functional Description (Continued)
OFF PHASE
In the OFF phase, both Master and Slave MPL transmitters
are turned off with zero current flowing on the MC and MDn
lines. Figure 7 shows the transition of the MPL bus into the
OFF phase. If an MPL line is driven to a logical Low (high
current) when the OFF phase is entered it may temporarily
pass through as a logical High (low current) before reaching
the zero line current state.
The link may be powered down by asserting both the Mas-
ter’s and Slave’s PD* input pins (Low). This causes the
devices to immediately put the link to the OFF Phase and
internally enter a low power state. To avoid loss of data the
Master’s PD* input should only be asserted after the MPL
bus has been in the IDLE state for at least 20 MC clock
cycles. This gives the Slave enough time to complete any
write operations received from the MPL bus.
CPU INTERFACE COMPATIBILITY
The CPU i80 Interface provides compatibility between a
CPU Interface host and a small form factor (SFF) Display or
other fixed I/O port application.
WRITE TRANSACTION
The WRITE transaction consists of one MC cycle of control
information followed by four MC cycles of write data for a
16-bit WRITE. Since WRITE transactions transfer informa-
tion on both edges of MC it takes five MC cycles to complete
a write transaction. The MD0 line carries the Start bit (Low),
the A/D (Address/Data) bit and then the data payload of 8
bits (D0-7). The MD1 line carries the R/W* bit (Read/Write*),
the CS1/2 bit and then the data payload of 8 bits (D8-15).
The data payload is sent least significant bit (LSB) first. The
CS1/2 bit denotes which Chipset pin was active. CS1/2 =
HIGH designates that CS1* is active (Low). CS1/2 = LOW
designates that CS2* is active (Low). CS1* and CS2* LOW
is not allowed.
8-bit and 9-bit CPU bus widths may be supported by tieing
off unused inputs.
20186005
FIGURE 6. Bus Power Up Timing
20186006
FIGURE 7. Bus Power Down Timing
www.national.com
8


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