Section 8 RAM-FIFO Unit (RFU)
Rev. 3.00 Jan 25, 2006 page 202 of 872
REJ09B0286-0300
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Hardware (MCIF, RFU)
Firmware (CPU)
Command transmission
(data transmission to multimedia card)
Command transmission
(data reception from multimedia card)
Data reception end
Data reception
resumption instruction
(Reception resumption)
FIFO full cancellation waiting
for card clock stop
(reception halted)
Full cancellation
1-byte data reception
from multimedia card
1-byte data write to RFU
Data start
bit received?
Previous data
write sequence
Card clock stop
(reception halted)
All data
reception ended?
FIFO full
FIFO full
Data
reception command
sequence ended?
Command sequence end
Data read
from RFU ended?
FIFO full cancellation
(data read from RFU)
Figure 8.12 Operation Flow of MCIF Reception
8.9
Interrupt Sources
The RFU supports six interrupts
:
Boundary overflow (at reading), boundary overflow (at writing),
FIFO full, FIFO empty, FIFO overread, and FIFO overwrite.
Identical interrupt vector addresses are assigned to boundary overflow (at reading), boundary
overflow (at writing), FIFO full, and FIFO empty.
When an interrupt is generated, the interrupt source can be judged by reading the interrupt flag in
DTSTRC.
In addition, FIFO overread and FIFO overwrite have common interrupt vector addresses. When an
interrupt is generated, the interrupt source can be judged by reading the interrupt flag in DTSTRC.
Содержание H8S/2158
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Страница 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Страница 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Страница 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
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...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
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...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
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...