Cirrus Logic CS5463 - Manual (Page 22)

CS5463
22 DS678F3
If the serial port interface becomes unsynchronized with
respect to the SCLK input, any attempt to clock valid
commands into the serial interface may result in unex-
pected operation. Therefor, the serial port interface
must then be re-initialized by one of the following ac-
tions:
- Drive the CS pin high, then low.
- Hardware Reset (drive RESET pin low for at
least 10 µs).
- Issue the Serial Port Initialization Sequence,
which is 3 (or more) SYNC1 command bytes
(0xFF) followed by one SYNC0 command byte
(0xFE).
If a re-synchronization is necessary, it is best to re-ini-
tialize the part either by hardware or software reset
(command 0x80), as the state of the part may be un-
known.
5.15 Register Paging
Read/write commands access one of the 32 registers
within a specified page. By default, Page = 0. To access
registers in another page, the Page Register (address
0x1F) must be written with the desired page number.
Example:
Reading register 6 in page 3.
1. Write 3 to page register with command and data:
0x7E 0x00 0x00 0x03
2. Read register 6 with command:
0x0C 0xFF 0xFF 0xFF
0xFFF
0x000
0x3FF
Hardware Registers*
32 Pages
Software Register*
32 Pages
ROM
2048 Words
0x400
0x7FF
0x800
Pages
0x40 - 0x7F
Pages
0x20 - 0x3F
Pages
0 - 0x1F
* Accessed using register read/write commands.
Figure 11. CS5463 Memory Map