Media Local Bus (MLB)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
33-14
Freescale Semiconductor
Preliminary
33.3.1.9
TX Sync Channel Address Mask Register (MLB_TXSCHAMR)
The MLB_TXSCHAMR contains the TX Sync Channel Address Mask for this device.
Offset M0x001C
Access: Read/Write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
TXSCHA_A
CEN
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0
0
0
0
0
0
0
0
0
0
TXSCHA
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 33-10. MLB TX Sync Channel Address Register (MLB_TXSCHAR)
Table 33-9. MLB TX Sync Channel Address Register (MLB_TXSCHAR) Field Descriptions
Field
Description
TXSCHA_ACEN
TX Sync Channel Address Comparison Enable. When enabled a received Channel Address is compared
against the TX Sync Channel Address configured in this register. TXSCHA_ACEN should only be updated
when MDIS is set.
0 TX Sync Channel Address comparison disabled (default out of reset)
1 TX Sync Channel Address comparison enabled
bits 1–25
Reserved.
TXSCHA
TX Sync Channel Address. If TXSCHA_ACEN=1, this address will be compared against the logical
address that was driven on the bus by the MLB controller (INIC). If the received channel address matches
the programmed value in the MLB_TXSCHAR register the appropriate output buffer enables are driven
(
Section 33.4.2.1.4, “MLBSIG_BUFEN and MLBDAT_BUFEN
”).
Although Channel Addresses are defined to be sixteen bits wide, bits 15 through 9 and the LSB are
always zero. The odd addresses are reserved and Channel Address 0x0000 is the bus idle state. Only
the 31 even addresses between 0x0002 and 0x003E are allowed; therefore, only five bits per Channel
Address are required to be configured. TXSCHA should only be updated when MDIS is set.
An address match occurs when TXSCHA_ACEN is set and the received 16 bit Channel Address equals
16b0000_0000_00_{TXSCHA}_0.
bit 31
Reserved.