Programmer’s Model for Test
4.2Test registers
Test registers are provided to enable testing of the SSMC using the AMBA TIC block level tests methodology and for integration testing.
4.2.1SSMC test control register, SSMCITCR
This read/write register is used to control the test mode of the SSMC. Table 4-1 shows the bit assignment of the SSMCITCR register.
|
|
|
|
Table 4-1 SSMCITCR register bits |
|
|
|
|
|
Bits |
Name |
Type |
Description |
|
|
|
|
|
|
31:1 |
Reserved |
- |
Reserved, do not modify, read as zero, write as zero. |
|
|
|
|
|
|
0 |
S |
Read/write |
Test mode enable. Multiplex the test registers to control the input and output lines: |
|
|
|
|
0 |
= normal operation |
|
|
|
1 |
= test registers multiplexed onto input and output lines. |
|
|
|
|
|
4.2.2SSMC test input register, SSMCITIP
This read/write register is used to control and read the inputs of the SSMC. Table 4-2 shows the bit assignment of the SSMCITIP register.
|
|
|
Table 4-2 SSMCITIP register bits |
|
|
|
|
Bits |
Name |
Type |
Description |
|
|
|
|
31:7 |
Reserved |
- |
Reserved, do not modify, read as zero, write as zero. |
|
|
|
|
6 |
SMBUSBACKOFFEBI |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
5 |
SMTICBUSGNTEBI |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
4 |
SMBUSGNTEBI |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
ARM DDI 0236A |
Copyright © 2001. All rights reserved. |
4-3 |
Programmer’s Model for Test
|
|
|
Table 4-2 SSMCITIP register bits (continued) |
|
|
|
|
Bits |
Name |
Type |
Description |
|
|
|
|
3 |
SMEXTBUSMUX |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
2:1 |
SMMEMCLKRATIO |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
0 |
SMBIGENDIAN |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
4.2.3SSMC test output register, SSMCITOP
This read/write register is used to control and read the outputs of the SSMC. Table 4-3 shows the bit assignment of the SSMCITOP register.
|
|
|
Table 4-3 SSMCITOP register bits |
|
|
|
|
Bits |
Name |
Type |
Description |
|
|
|
|
31:2 |
Reserved |
- |
Reserved, do not modify, read as zero, write as zero. |
|
|
|
|
1 |
SMTICBUSREQEBI |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
0 |
SMBUSREQEBI |
Read/write |
Read returns current value of signal. |
|
|
|
Write sets signal to value written. |
|
|
|
|
4-4 |
Copyright © 2001. All rights reserved. |
ARM DDI 0236A |