Ir Encoder/Decoder Functions; Figure 4-1. Ir Encoder/Decoder Block Diagram - Renesas EMMA Mobile 1 User Manual

4.6 IR Encoder/Decoder Functions

EM1 incorporates an IrDA SIR (2.4 to 115.2 kbps) encoder/decoder (IR encoder/decoder). Figure 4-1 shows a
block diagram of the IR encoder/decoder.
The IR transmission/reception mode is entered when bit 0 (IR_MODE) of the IRCR0 register is set to 1. (The IR
encoder/decoder is inserted into the data path used for transmission and reception via the UARTx_SIN and
UARTx_SOUT pins.)
Receive
shift register
(RSR)
Transmit
shift register
(TSR)
16x clock
XIN
Baud rate
generator
CHAPTER 4 DESCRIPTION OF FUNCTIONS

Figure 4-1. IR Encoder/Decoder Block Diagram

0
Sel
IR decoder
RZI-to-NRZ
1
converter
16x clock
XIN
Receive data mask
XIN
IR encoder
NRZ-to-RZI
converter
16x clock
IRCR0 (IR_MODE)
User's Manual S19262EJ3V0UM
IRCR1 IRCR0
(PULSE_WIDTH[7:0]) (IR_RXPSEL)
Sel
0
Receive pulse
1
detector
Enable
controller
IRCR0 (IR_RXEN)
IRCR0 (IR_MASK_OFF)
IRCR4, IRCR3, IRCR2
(MASK_PERIOD[19:0])
Sel
0
1
IRCR0 (IR_TXPSEL)
UARTx_SIN
MON_TXPSEN
0
Sel
UARTx_SOUT
1
MON_IRDAON
BAUDOUT
41