Data Format - Toshiba TLCS-900/L1 Series Manual

(3) Data format

The data format is fixed as follows:
•
Data length: 8-bit
• Parity bits: none
• Stop bits: 1
Any other settings don't guarantee the normal operation.
(4) SFR
Figure 3.9.27 shows the control register SIRCR. Set the data SIRCR during SIO0 is
inhibited (Both TXEN and RXEN of this register should be set to 0).
Any changing for this register during transmission or receiving operation don't
guarantee the normal operation.
The following example describes how to set this register:
1) SIO setting
↓
2) LD (SIRCR), 07H
3) LD (SIRCR), 37H
↓
4) Start transmission
and receiving for SIO0
(5) Notes
1) Baud rate generator for IrDA
To generate baud rate for IrDA, use baud rate generator in SIO0 by setting 01 to
SC0MOD0<SC1:0>. To use another source (TA0TRG, f
allowed.
2) As the IrDA 1.0 physical layer specification, the data transfer speed and infra-red
pulse width is specified.
Table 3.9.4 Baud Rate and Pulse Width Specifications
Baud Rate Modulation
2.4 kbps RZI
9.6 kbps RZI
19.2 kbps RZI
38.4 kbps RZI
57.6 kbps RZI
115.2 kbps RZI
The infra-red pulse width is specified either baud rate T × 3/16 or 1.6 µs (1.6 µs is
equal to 3/16 pulse width when baud rate is 115.2 kbps).
The TMP91C824FG has the function selects the pulse width on the transmission
either 3/16 or 1/16. But 1/16 pulse width can be selected when the baud rate is equal
or less than 38.4 kbps only. When 57.6 kbps and 115.2 kbps, the output pulse width
should not be set to T × 1/16.
; Set the SIO to UART Mode.
; Set the receive data pulse width to 16 × .
; TXEN, RXEN Enable the Transmission and receiving of SIO.
; The modem operates as follows:
SIO0 starts transmitting.
IR receiver starts receiving.
Rate Tolerance Pulse Width
(% of rate) (Minimum)
± 0.87 1.41 µ s
± 0.87 1.41 µ s
± 0.87 1.41 µ s
± 0.87 1.41 µ s
± 0.87 1.41 µ s
± 0.87 1.41 µ s
91C824-151
TMP91C824
and SCLK0 input) are not
SYS
Pulse Width Pulse Width
(Typical) (Maximum)
78.13 µ s 88.55 µ s
19.53 µ s 22.13 µ s
9.77 µ s 11.07 µ s
4.88 µ s 5.96 µ s
3.26 µ s 4.34 µ s
1.63 µ s 2.23 µ s
2008-02-20