SH7014 Datasheet, PDF (410/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

13. High Speed A/D Converter ⎯ SH7014 ⎯
13.3 Bus Master Interface
The ADDRA to ADDRH are 16-bit registers with a 16-bit width data bus to the bus master. The
bus master can read from ADDRA to ADDRH in either word or byte units.
When an ADDR is read in word units, the ADDR contents are transferred to the bus master 16 bits
at a time. In byte unit reads, the contents of the most significant eight bits (AD9 to AD2) of the
converted data (AD9 to AD0) are transferred to the bus master.
Figures 13.2 (1) and (2) show an example of the ADDR read operation.
Word data read
Data
register
0
0
0
0
0
0
AD 9
AD 8
AD 7
AD 6
AD 5
AD 4
AD 3
AD 2
AD 1
AD 0
Bus I/F
Internal data bus
Upper 8 bits
Lower 8 bits
Figure 13.2 ADDR Read Operation (1)
Rev.5.00 Sep. 27, 2007 Page 376 of 716
REJ09B0398-0500