ERM HR C6000, Руководство пользователя

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The HR_C6000 continuously receives 4FSK modulated low IF signals in one layer mode, and the
signal frequency is configurable. It is recommended to use 455 kHz or 450 kHz IF signals.
HR_C6000 stores the demodulated 36 bytes of data per frame into the interval of the receiving end
1.2KRAM space starting address 0x30. The MCU can read each frame of data from the RAM
through the SPI interface and compare it with the 36 bytes of the transmitted data to get the number
of error bits of the frame data. The number of error bits per frame of continuous continuous test is
accumulated for a long time, and the bit error performance of HR_C6000 is counted.
The data stored in the RAM, the defined data storage structure is shown in Figure 5.15. The MCU
can read the frame type (SyncState and SyncClass (0x51)) according to the interrupt, and read the
corresponding length data according to the frame type, and parse according to the format. (The data
content in the dotted box is to receive additional CACH data in continuous mode).
SlotType
20bit SYNC
48bit Data
196bit
SYNC/EMB
/RC 48bit Voice
216bit
SYNC
48bit Data
48bit
Figure 5.15 Receive Data Frame Type Format
2. Register settings:
Realize the bit error rate test function in one layer mode, the register that needs to be configured is
Realize the bit error rate test function in one layer mode, the registers that need to be configured are
Table 5.6 One layer mode error rate test control register address description
Address Configuration value Description
0x01 2’bxxxx 0000 Configured in IF receive mode.
0x07 2’b0000 1011 The IF frequency word is 8 bits high, and the 24-bit IF
frequency word is divided by 2^24 by 9.8304M to get the final
IF frequency. The default setting is 455kHz.
0x08 2’b1101 1001 8 bits in the IF frequency word.
0x09 2’b0101 0100 The IF frequency word is 8 bits low.
0x10 2’b0000 0010 One layer mode, and continuous reception, if you need time slot
reception, you need to configure bit5 to 1.
0x40 2’b0100 0000 Receive enable is enabled and configured as a test mode.
0x41 2’b0100 0001 Receive test enable is enabled.
6 FM application
The HR_C6000 is compatible with FM and supports FM transceiver function. The HR_C6000 can
work in FM mode by configuring register 0x10[7]=1'b1. The chip is embedded with modules such