SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 412

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Electrical Specifications
8.3.10 Serial Port (UART)
1.
2.
3.
4.
Symbol
t
t
t
t
S
t
Consumer
BT
CMW
CMP
SPW
SJT
Sharp IR
DRT
Remote
Control
t
ting of the Baud Generator Divisor registers.
t
termined by the MCPW field (bits [7:5]) of the IRTXMC register and the TXHSC bit (bit 2) of the RCCFG register.
t
by the MCFR field (bits [4:0]) of the IRTXMC registerand the TXHSC bit (bit 2) of the RCCFG register.
t
the signal to be accepted by the receiver. These time values are determined by the contents of register IRRXDC and
the setting of the RXHSC bit (bit 5) of the RCCFG register.
UART
BTN
CWN
CPN
MMIN
SIR
is the nominal bit time in UART, Sharp-IR, SIR and Consumer Remote Control modes. It is determined by the set-
is the nominal period of the modulation signal for Sharp-IR and Consumer Remote Control modes. It is determined
is the nominal pulse width of the modulation signal for Sharp-IR and Consumer Remote Control modes. It is de-
and t
Table 8-29. UART, Sharp-IR, SIR, and Consumer Remote Control Timing Parameters
Figure 8-41. UART, Sharp-IR, SIR, and Consumer Remote Control Timing Diagram
Parameter
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
SIR Signal Pulse Width
SIR Data Rate Tolerance
% of Nominal Data Rate
SIR Leading Edge Jitter
% of Nominal Bit Duration
t
t
CMW
SPW
MMAX
define the time range within which the period of the incoming subcarrier signal has to fall in order for
t
BT
(Continued)
t
CMP
(
3
/
16
t
t
t
CWN
t
CPN
BTN
) x t
BTN
t
MMIN
1.48
Min
500
BTN
1
- 25
- 25
- 25
- 2%
4
- 15
1
3
2
412
1
(
3
/
16
t
t
) x t
t
t
BTN
CWN
BTN
CPN
t
MMAX
Max
1.78
0.87%
2.0%
2.5%
6.5%
BTN
+ 2%
+ 25
+ 25
+ 25
4
15
1
Unit Comments
ns
ns
ns
ns
ns
ns
ns
µs
µs
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
Transmitter, Variable
Transmitter, Fixed
Receiver
Transmitter
Receiver
Transmitter
Receiver
Revision 3.0