C8051F120 Datasheet, PDF (350/356 Pages) Silicon Laboratories – Mixed Signal ISP Flash MCU Family

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
Reset Value
0000000000
Bit9
Bit0
This register is used to read or write data to the Flash memory across the JTAG interface.
Bits9-2:
Bit1:
Bit0:
DATA7-0: Flash Data Byte.
FAIL: Flash Fail Bit.
0: Previous Flash memory operation was successful.
1: Previous Flash memory operation failed. Usually indicates the associated memory loca-
tion
was locked.
BUSY: Flash Busy Bit.
0: Flash interface logic is not busy.
1: Flash interface logic is processing a request. Reads or writes while BUSY = 1 will not
initiate another operation
Figure 25.4. FLASHDAT: JTAG Flash Data Register
Bit16
Reset Value
0x00000
Bit0
This register holds the address for all JTAG Flash read, write, and erase operations. This register
autoincrements after each read or write, regardless of whether the operation succeeded or failed.
Bits15-0: Flash Operation 17-bit Address.
Figure 25.5. FLASHADR: JTAG Flash Address Register
350
Rev. 1.3