r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1241

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

(3)
Some broadcast commands do not require a command response.
Figure 24.3 shows an example of the command sequence for commands that do not require a
command response.
Figure 24.4 shows the operational flow for commands that do not require a command response.
• Make settings to issue the command.
• Set the CMDSTART bit in CMDSTRT to 1 to start command transmission. MMCCMD must
• The end of the command sequence is detected by poling the BUSY flag in CSTR or by the
(CMDSTART)
Input/output pins
CMDSTRT
INTSTR0
(CWRE)
MMCCLK
MMCCMD
MMCDAT
(BUSY)
(REQ)
(CMDI)
CSTR
be kept driven until the end bit output is completed.
command transmit end interrupt (CMDI).
Operation of Commands Not Requiring Command Response
Figure 24.3 Example of Command Sequence for Commands
Not Requiring Command Response
Command transmission
started
Command transmission period
Command sequence period
Command output (48 bits)
Rev.1.00 Jan. 10, 2008 Page 1211 of 1658
24. Multimedia Card Interface (MMCIF)
Command transmission
REJ09B0261-0100
ended
Cleared by
software