mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 197

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

15.6.2 DDC2 Address Register (D2ADR)
MC68HC908BD48
Freescale Semiconductor
—
Rev. 2.1
Address:
EXTAD — DDC Expanded Address
D2AD[7:1] — DDC2 Address
Reset:
Read:
Write:
This bit is set to expand the calling address of the DDC in slave mode.
When set, the DDC will acknowledge the general call address $00
and the matched 4-bit MSB address, DAD[7:4].
For example, when DAD[7:1] = $A1 and EXTAD = 1, the DDC calling
address is $A0, and it will acknowledge calling addresses $00 and
$A0 to $AF.
Reset clears this bit.
These 7 bits represent the second slave address for the DDC2BI
protocol. D2AD[7:1] should be set to the same value as DAD[7:1] in
DADR if user application do not use DDC2BI. Reset clears all bits this
register.
1 = DDC calling address is $DAD[7:4]0
0 = DDC address id $DAD[7:1]
D2AD7
$001C
Bit 7
DDC respond address is $00, and $DAD[7:4]0 to $DAD[7:4]F
0
Figure 15-2. DDC2 Address Register (D2ADR)
DDC12AB Interface
D2AD6
6
0
D2AD5
5
0
D2AD4
4
0
D2AD3
3
0
D2AD2
2
0
DDC12AB Interface
D2AD1
1
0
Data Sheet
Bit 0
0
0
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