SB16C1054_Data Sheet_EN

ManualsBrandsSystemBase ManualsElectronic ComponentsQuad UART with 256 Byte TX/RX FIFO, 80-pin TQFP - 119pcs Bundle

SB16C1054

QUAD UART WITH 256-BYTE FIFO

FEBRUARY 2009 REV 1.0

5

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Table 26: SB16C1054 Programming Guide…continued

Command Action

5. Read Data

6. Output TX

For (Cnt = 0; Cnt < temp3; Cnt++)

Read TX_Data from TX_User_Buffer

Set THR to TX_Data

Return from Interrupt Service Routine

Serial Input Process

1. RX Interrupt is generated and jumped to

Interrupt Service Routine

2. Read ISR

3. Check TX Interrupt Status

4. Read RX FIFO Count

5. Read RX Data

5. Read Data

Read ISR, then save in temp1

If temp1 = xx00_0100b then

Goto RX Interrupt Service Routine

Else if temp1 = xx00_0010b then

Goto TX Interrupt Service Routine

Else

Return from Interrupt Service Routine

TX Interrupt Service Routine:

…..

RX Interrupt Service Routine:

Read MCR, save in temp2

Set MCR to (temp2 OR 40h)

Read RCR, save in temp3

Set MCR to temp2

If temp1[6] = 1b then

For (Cnt = 0; Cnt <= 255; Cnt++)

Read RBR, save in RX_User_Buffer

Else

For (Cnt = 0; Cnt < temp3; Cnt++)

Read RBR, save in RX_User_Buffer

Return from Interrupt Service Routine