Keywords: HDLC controller, DS3134, CHATEAU, test registers
Following is a list of registers users need to avoid. These registers will be reset to "0"s upon power on (hardware) reset or soft system reset. It is recommended to check these registers after soft system reset. All of these registers are 16 bits registers.
Table 1. CHATEAU Internal Test Register
|Address (h)||Value (h)|
|04F0 - 04FF||0000|
|07FD - 07FF||0000|
|08FD - 08FF||0000|
|09F8 - 09FF||0000|
Register address 0050h bit 0 is the FT (factory test mode). All the other registers shown in the above table are for CHATEAU internal (Dallas Semiconductor) tests only, not user test mode controls. Values of these bits should always be "0". If any of these bits are at "1", the device will not function properly.
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