PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 199

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

13.3.7 UART, Sharp-IR and Consumer-IR Timing
t
t
t
BT
CMW
CMP
Symbol
UART
Sharp-IR
Consumer Remote Control
a. t
b. t
c. t
d. t
the setting of the Baud Rate Generator Divisor registers BGDL and BGDH at offsets 00h and 01h, respectively.
It is determined by the MCPW field (bits 7-5) of the IRTXMC register at offset 01h and the TXHSC bit (bit 2) in
the RCCFG register at offset 02h. Both registers are in bank 7 of logical device 5.
determined by the MCFR field (bits 4-0) of the IRTXMC register at offset 01h and the TXHSC bit (bit 2) of the
RCCFG register at offset 02h. Both registers are in bank 7 of logical device 5.
order for the signal to be accepted by the receiver. These time values are determined by the content of regis-
ter IRRXDC at offset 00h and the setting of the RXHSC bit (bit 5) in the RCCFG register at offset 02h. Both
registers are in bank 7 of logical device 5.
BTN
CWN
CPN
MMIN
Single Bit Time in UART and Sharp-IR
Modulation Signal Pulse Width in Sharp-IR and
Consumer Remote Control
Modulation Signal Period in Sharp-IR and
Consumer Remote Control
is the nominal bit time in UART, Sharp-IR, SIR and Consumer Remote Control modes. It is determined by
is the nominal period of the modulation signal for Sharp-IR and Consumer Remote Control modes. It is
is the nominal pulse width of the modulation signal for Sharp-IR and Consumer Remote Control modes.
and t
MMAX
FIGURE 13-11. UART, Sharp-IR and Consumer Remote Control Timing
TABLE 13-41. UART, Sharp-IR and Consumer Remote Control Timing
define the time range within which the period of the incoming carrier signal has to fall in
Parameter
t
CMW
Device Description
t
BT
t
CMP
199
Conditions
Transmitter
Transmitter
Transmitter
Receiver
Receiver
Receiver
t
t
t
CWN
t
BTN
CPN
BTN
t
MMIN
Min
500
30
30
30
2%
d
a
c
b
t
t
t
t
BTN
CWN
CPN
BTN
t
MMAX
Max
+ 2%
+ 30
+ 30
+ 30
d
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nsec
nsec
nsec
nsec
nsec
nsec
Unit