ZIOL2201 datasheet(31/92 Pages) RENESAS

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ZIOL2xxx Datasheet

April 26, 2016

• WRITE1: write access to register file (if applicable) or EEPROM, block access only supported with the

access to register file

• COMMAND: Commands to achieve an IC (soft-)reset or up- or download of configuration data

Figure 3.11 illustrates the structure of supported SPI accesses. The in this figure illustrated write access works

only with the IC versions ZIOL2xx1

Figure 3.11 Structure of SPI accesses

ADDR

SHIFT

D...

DUMMY

SIGNAL Byte

ADDR

SHIFT

D...

OUT

WRITE

ADDR

SHIFT

DUMMY

SIGNAL Byte

ADDR

SHIFT

D...

READ

OUT

8 clks

8clk

Clock

ADDR=0xFF

CMD

DUMMY

SIGNAL Byte

CMD

COMMAND

OUT

[5:0] Address

[7:6]

Segment

ADDR

R/W

SHIFT

Shift Counter Value

= number of bytes - 1

Signal Byte

All ’0’ = not busy

ADDR

0 : register file

1 : EEPROM

2 : do not use

3 : do not use

0 : write

1 : read

3.3.8.2.

SPI access details

The timing of the three SPI access types is illustrated in Figure 3.13. As shown in this figure the 1

st byte, which is

called destination byte, is composed out of the segment address (bit 7:6) and the register address (bit 5:0). A

command is always using the address 0xFF which is a not physically implemented memory location within the IC

memory unit.

1 Note: IC versions ZIOL2xx2 do not allow any write access.

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