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EB632 数据表(PDF) 49 Page - Freescale Semiconductor, Inc |
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EB632 数据表(HTML) 49 Page - Freescale Semiconductor, Inc |
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49 / 112 page  CPM Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M), Rev. 2 Freescale Semiconductor 49 14.4.14 TC Layer Event Register (TCERx) The TC layer event registers (TCERx), as shown in Figure 20, records error events for each TC block. TCER event bits are cleared by writing ones to them. The TCER bits are described in Table 36. 14.4.15 TC Layer Mask Register (TCMRx) The TCMRx field description is identical to that of TCER (refer to Section 14.4.14). Each bit that is set in TCMR enables an interrupt when the corresponding bit in TCER is set. Bit 0123 4567 8 9 10 11 12 13 14 15 Field OR UR CDT MS PARE — ROF TOF EOF COF IOF FOF Reset 0 0000 0000 0000 000 R/W R/W Figure 20. TCERx Table 36. TCER Field Descriptions Name Description Description OR 0 Overrun Indicates whether the Rx FIFO is full when a complete cell is received. 0 The Rx FIFO is not full or another complete cell is not received. 1 The Rx FIFO is full and another complete cell is received. The cell is discarded. UR 1 Underrun Indicates whether there is no ATM cell to transmit. The interrupt is enabled only if TCMODE[URE] is set. 0 The Tx FIFO is not empty or the cell transmission is not completed. 1 The Tx FIFO is empty and the cell transmission is completed. An idle cell is sent. The idle cell header is 0x00000001 (I.432), whose HEC is 0x52. The idle cell payload is 0x6A (I.432). CDT 2 Cell delineation toggled Indicates whether the cell delineation bit (TCGSR[CD]) bit changed. 0 TCGSR[CD] did not change. 1 TCGSR[CD] changed. MS 3 Misplaced Tx Sync signal Indicates whether the Tx Sync is out of place. The first Tx Sync is by definition always in place. 0 Tx Sync is not out of place. 1 Tx Sync is out of place. PARE 4 Parity event Indicates whether the parity is incorrect. 0 The transmit parity from UTOPIA is correct. 1 The transmit parity from UTOPIA is wrong. — 5–9 Reserved. Write to 0 for future compatibility. ROF 10 Received cell counter overflow Indicates that the received cells counter passed its maximum value. 0 The received cells counter did not pass its maximum value. 1 The received cells counter passed its maximum value. TOF 11 Transmitted cell counter overflow Indicates that the transmitted cells counter passed its maximum value. 0 The transmitted cells counter did not pass its maximum value. 1 The transmitted cells counter passed its maximum value. EOF 12 Errorred cells counter overflow Indicates that the errorred cells counter passed its maximum value. 0 The errored cells counter did not pass its maximum value. 1 The errored cells counter passed its maximum value. COF 13 Corrected cells counter overflow Indicates that the corrected cells counter passed its maximum value. 0 The corrected cells counter did not pass its maximum value. 1 The corrected cells counter passes its maximum value. IOF 14 Tx Idle cells counter overflow Indicates that the Tx idle cells counter passed it maximum value. 0 The Tx idle cells counter did not pass its maximum value. 1 The Tx idle cells counter passes its maximum value. FOF 15 Filtered cells counter overflow Indicates that the filtered cells counter passed its maximum value. 0 The filtered cells counter did not pass its maximum value. 1 The filtered cells counter passed its maximum value. |
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