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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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CC1010-RTR1 Datenblatt(PDF) 41 Page - Texas Instruments |
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CC1010-RTR1 Datenblatt(HTML) 41 Page - Texas Instruments |
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41 / 152 page  CC1010 SWRS047 Page 41 of 152 0 1 2 126 127 128 129 130 190 191 192 193 194 222 223 224 225 226 238 239 240 241 242 246 247 248 249 250 251 252 253 254 255 0x7FFF 0x7E00 0x7C00 0x7800 0x7000 0x6000 0x4000 0x0000 Page 0 is locked when BBLOCK is cleared Figure 6. Flash Lock Bits illustration 15.12.9 Read Lock Bits The lock bits described in the previous section can be read through the SPI interface by using the Read Lock Bits instruction. The instruction will return the 8 lock bits in byte 4 of the instruction. Wait at least 9 ⋅ TXOSC between the last negative transition on SCK for byte 3 before issuing the first positive edge on SCK for byte 4 to receive valid data, as with the Read Program Memory instruction. The lock bits can only be read through the SPI interface, and not from the 8051 core. 15.12.10 Read Signature Byte A 6 byte chip signature can be read through the SPI interface using the Read Signature Byte instruction. The 3 bit signature byte address is issued, and the value is then returned as byte 4. Signature byte address Value Meaing 000 0x7F 001 0x7F 010 0x7F 011 0x9E JEDEC manufacturer ID, identifies Chipcon AS as the manufacturer. 100 0x95 Identifies 32 kBytes of Flash memory 101 0x00 Identifies CC1010 Table 19. Signature Bytes Wait at least 9 ⋅ TXOSC between the last negative transition on SCK for byte 3 before issuing the first positive edge on SCK for byte 4 to receive valid data, as with the Read Program Memory instruction. 15.12.11 SPI Flash Programming Initialisation CC1010 must be set into the Flash programming mode to allow SPI Flash operations. This is done as follows: • Apply power between all DVDD and DGND pins. • Hold PROG low. • If a crystal is connected between XOSC_Q1 and XOSC_Q2, hold RESET low and wait for the oscillator to start up. Crystal oscillator start-up times are given in Table 10. Release RESET and wait at least 4 crystal oscillator periods. • If a crystal is not connected between XOSC_Q1 and XOSC_Q2, hold RESET low and apply a clock signal to XOSC_Q1. Release RESET after at least 3 clock periods, and then wait at least 4 clock periods. • Execute the Programming Enable instruction to complete the SPI Flash programming Initialisation. CC1010 is now ready to be programmed, as described in the next section. |
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