Command Registers 0 To 5 (Cmdr0 To Cmdr5); Table 19.3 Cmdr Configuration - Renesas H8S/2158 User Manual

19.3.6

Command Registers 0 to 5 (CMDR0 to CMDR5)

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

Register Contents
CMDR0 Start bit
Host bit
Command index of
6 bits
CMDR1 to Command argument
CMDR4 of 32 bits
CMDR5 CRC of 7 bits
End bit
CMDR0
Bit Bit Name
7 Start
6 Host
5 to —
0
CMDR1, CMDR2, CMDR3, CMDR4
Bit Bit Name
7 to —
0
CMDR5
Bit Bit Name
7 to CRC
1
0 End
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.
Initial Value R/W
0 R/W
0 R/W
All 0 R/W
Initial Value R/W
All 0 R/W
Initial Value R/W
— —
— —
Section 19 Multimedia Card Interface (MCIF)
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)
Rev. 3.00 Jan 25, 2006 page 637 of 872
Remarks
Initial value: H'00
Initial value: H'00
Initial value : Undefined
Always read as H'00
REJ09B0286-0300