9
D6F-PH MEMS Differential pressure Sensor User’s Manual (A288)
7-2-1. Access Address Registers (00h – 01h)
The access address registers are used to access internal register blocks including sensor
register map, ADC register map, and internal memory. It specifies the data transfer start address
with auto increment for multiple byte data transfer.
Table6. Access Address Register
Address
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
00h
A15
A14
A13
A12
A11
A10
A9
A8
01h
A7
A6
A5
A4
A3
A2
A1
A0
7-2-2. Serial Control Register (02h)
Table7. Serial Control Register (02h)
The serial control register contains various bits to modify the behavior of the serial access.
Address
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
02h
D_byte_
cnt[3]
D_byte_
cnt[2]
D_byte_
cnt[1]
D_byte_
cnt[0]
Req
R_WZ
Acc_ctl2
[1]
Acc_ctl2
[0]
•
Acc_ctl2 [1
:
0] – Access Control bits
0 0 = 16bits address (A15-A0) access ( internal ROM and registers)
0 1 = 8bits address (A7-A0) access
and used to access MCU internal 256 byte dual
port RAM.
1 0 = reserved
1 1 = reserved
•
R_WZ – Read or Write access select bit
0 = Write Access
1 = Read Access
•
Req- Request bit
0 = the previous request is done
1 = new request. After the serial bus bridge controller finishes a request, it will clear
Req to 0. For write requests the bridge controller moves the data in write data
buffers to the location pointed by access address. For read requests the bridge
controller stores the read data into data buffer.
•
D_byte_cnt3 [3
:
0]
Transfer data byte count. It only supports 1, 2, 3, 4 data byte transfer.
Summary of Contents for D6F-PH
Page 35: ......