MPC8280 datasheet(608/1386 Pages) FREESCALE

608 / 1386 page

Serial Interface with Time-Slot Assigner

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

15-30

Freescale Semiconductor

2. CMXSI1CR = 0x00. TDMA receive clock is CLK1.

3. CMXSMR = 0x80. SMC1 is connected to the TSA.

4. CMXSCR = 0xC040_0000. SCC1 and SCC2 are connected to the TSA. SCC1 supports the grant

mechanism because it handles the D channel.

5. SI1AMR = 0x0145. TDMA grant mode is used with 1-bit frame sync delay in Tx and Rx and

common receive-transmit mode.

6. Set PPARA[6–9]. Configures L1TXDa[0], L1RXDa[0], L1TSYNCa, and L1RSYNCa.

7. Set PSORA[6–9]. Configures L1TXDa[0], L1RXDa[0], L1TSYNCa, and L1RSYNCa.

8. Set PDIRA[9]. Configures L1TXDa[0].

9. Set PODRA[9]. Configures L1TXDa[0] to an open-drain output.

10. Set PPARC[30,31]. Configures L1TCLKa and L1RCLKa.

11. Clear PDIRC[30,31] Configures L1TCLKa and L1RCLKa.

12. Clear PSORC[30,31]. Configures L1TCLKa and L1RCLKa.

13. Set PPARB[17]. Configures L1RQa.

14. Clear PSORB[17]. Configures L1RQa.

15. Set PDIRB[17]. Configures L1RQa.

16. Set PPARD[13]. Configures L1ST1.

17. Clear PSORD[13]. Configures L1ST1.

18. Set PDIRD[13]. Configures L1ST1.

19. SI1CMDR is not used.

20. SI1STR does not need to be read.

21. Configure the SCC1 for HDLC operation (to handle the LAPD protocol of the D channel), and

configure SCC2 and SMC1 as preferred.

22. SI1GMR = 0x01. Enable TDM A (one static TDM).

23. Enable SCC1, SCC2 and SMC1.

15.7

Serial Interface GCI Support

The MPC8280 fully supports the normal mode of the GCI, also known as the ISDN-oriented modular

revision 2.2 (IOM-2), and the SCIT. The MPC8280 also supports the D-channel access control in S/T

interface terminals using the command/indication (C/I) channel

0000

0101

011

4-bit SMC1

1000

0001

000

1-bit SCC1

strobe1

Table 15-10. SI

x RAM Entries for an IDL Interface (continued)

Entry

Number

x RAM Entry

MCC

SWTR

SSEL

CSEL

CNT

BYT

LST

Description

MPC8280 Datasheet(PDF) 608 Page - Freescale Semiconductor, Inc

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