r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1207
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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24.3.1
The CMDR registers are six 8-bit registers. A command is written to CMDR as shown in table
24.4, and the command is transmitted when the CMDSTART bit in CMDSTRT is set to 1. Each
command is transmitted in order form the MSB (bit 7) in CMDR0 to the LSB (bit 0) in CMDR5.
Table 24.4 CMDR Configuration
(1)
Register
CMDR0 to
CMDR4
CMDR5
Bit
7 to 0
CMDR0 to CMDR4
Command Registers 0 to 5 (CMDR0 to CMDR5)
Bit Name
—
Contents
Command argument
CRC and End bit
Initial value:
Initial
Value
All 0
R/W:
Bit:
R/W
7
0
R/W
R/W
R/W
6
0
Operation
Write command arguments.
Setting of CRC is unnecessary (automatic calculation).
End bit is fixed to 1 and its setting is unnecessary
(automatic setting).
The read value is 0.
Description
Command arguments
See specifications for the MMC card.
Data is sequentially transmitted from CMDR0 MSB to
CMDR5 LSB.
R/W
5
0
(command argument)
R/W
4
0
R/W
3
0
Rev.1.00 Jan. 10, 2008 Page 1177 of 1658
R/W
2
0
24. Multimedia Card Interface (MMCIF)
R/W
1
0
R/W
0
0
REJ09B0261-0100
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