h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 689

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

19.3.6
A command is written to CMDR as shown in table 19.3, and a command is transmitted by setting
the START bit in CMDSTRT to 1.
Table 19.3 CMDR Configuration
CMDR0
CMDR1, CMDR2, CMDR3, CMDR4
CMDR5
Register
CMDR0
CMDR1 to
CMDR4
CMDR5
Bit
7
6
5 to
0
Bit
7 to
0
Bit
7 to
1
0
Bit Name
Start
Host
—
Bit Name
—
Bit Name
CRC
End
Command Registers 0 to 5 (CMDR0 to CMDR5)
Contents
Start bit
Host bit
Command index of
6 bits
Command argument
of 32 bits
CRC of 7 bits
End bit
Initial Value
0
0
All 0
Initial Value
All 0
Initial Value
—
—
Operation
Command index writing
Start bit is 0
Host bit is 1
Command argument writing
Automatic calculation for CRC
End bit is fixed to 1.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
Description
Start Bit (This bit should be cleared to 0)
Transmission Bit (This bit should be set to 1)
Command Indexes
Description
Command arguments
Description
CRC code (automatic calculation)
End bit (fixed to 1)
Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 637 of 872
Initial value: H'00
Remarks
Initial value: H'00
Initial value : Undefined
Always read as H'00
REJ09B0286-0300