Section 21 FSI Interface
Rev. 1.00 Apr. 28, 2008 Page 705 of 994
REJ09B0452-0100
FW Memory Read Cycles
FW Memory Write Cycles
State
Counts Content
Driven by
Value (3 to 0)
Content
Driven by
Value (3 to 0)
17 Turn-around
(recovery)
Slave 1111
Turn-around
(recovery)
Slave 1111
18 Turn-around
None ZZZZ
Turn-around
None ZZZZ
Note:
*
The number of wait cycles depends on the system clock.
The FSI supports byte, word, and longword transfers of FW memory read and write cycles. In
word transfer, the least address bit is fixed to B'0; while in longword transfer, the lower 2 bits are
fixed to B'00. When longword transfers of FW memory write cycles are used, the maximum
operating frequency of the system clock is 10 MHz.
21.4.2
SPI Flash Memory Transfer
The SPI flash memory transfer is performed using FSIDO and FSIDI synchronously with FSICK.
The initial value of FSICK can be either fixed to high or low through programming.
FSISS
FSICK
FSIDO
FSIDI
Bit7
Bit7
Bit6
Bit6
Bit5
Bit5
Bit4
Bit4
Bit3
Bit3
Bit2
Bit2
Bit1
Bit1
Bit0
Bit0
MSB
LSB
MSB
LSB
Figure 21.2 Example of SPI Flash Memory Transfer
Summary of Contents for H8S/2100 Series
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Page 92: ...Section 2 CPU Rev 1 00 Apr 28 2008 Page 66 of 994 REJ09B0452 0100...
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Page 244: ...Section 8 8 Bit PWM Timer PWMU Rev 1 00 Apr 28 2008 Page 218 of 994 REJ09B0452 0100...
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Page 612: ...Section 18 I 2 C Bus Interface IIC Rev 1 00 Apr 28 2008 Page 586 of 994 REJ09B0452 0100...
Page 706: ...Section 20 LPC Interface LPC Rev 1 00 Apr 28 2008 Page 680 of 994 REJ09B0452 0100...
Page 752: ...Section 21 FSI Interface Rev 1 00 Apr 28 2008 Page 726 of 994 REJ09B0452 0100...
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Page 1008: ...Section 28 Electrical Characteristics Rev 1 00 Apr 28 2008 Page 982 of 994 REJ09B0452 0100...
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