Section 6 Bus Controller
Rev. 3.00 Jan 25, 2006 page 138 of 872
REJ09B0286-0300
6.7.2
Valid Strobes
Table 6.10 shows the data buses used and valid strobes.
Table 6.10 Data Buses Used and Valid Strobes
Access
Size
Read/
Write
Address
C
C
C
CPCS1
PCS1
PCS1
PCS1
Pin
CPCS2
CPCS2
CPCS2
CPCS2
Pin
Valid
Strobe
Upper Data Bus
(D15 to D8)
Lower Data
Bus (D7 to D0)
Byte
Read
Even
L
H
CPOE
Invalid
Valid
(even data)
Odd
L
H
Invalid
Valid
(odd data)
Write
Even
L
H
CPWE
Undefined
Valid
(even data)
Odd
L
H
Undefined
Valid
(even data)
Word
Read
—
L
L
CPOE
Valid (odd data)
Valid
(even data)
Write
—
L
L
CPWE
Valid (odd data)
Valid
(even data)
Notes: Undefined: Undefined data is output.
Invalid: Input state with the input value ignored.
6.7.3
Basic Operation Timing
The memory card interface is basically specified as having 3 access states. Figure 6.17 shows the
access timing in memory card mode. The strobe signal waveform for the rising edge and falling
edge at address output can be moved one state by setting the OWEAC and OWENC bits in BCR,
respectively. In this case, wait states must be inserted. For 2-state access, clear both the OWEAC
and OWENC bits to 0. In addition, note that in 3-state access, set the OWEAC and OWENC bits
to B'01 or B'10. Figure 6.18 shows the access timing in memory card mode when the OWEAC and
OWENC bits are set to 1 simultaneously.
Содержание H8S/2158
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Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
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Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
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Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...