S6E2CC/C5/C4/C3/C2/C1 Series Flash Programming Specification, Document Number: 002-04913 Rev. *D
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1.4.5 FBFCR (Flash Buffer Control Register)
This section explains the FBFCR.
In flash accelerator mode (RWT = “0b10”/RWT = “0b11” in FRWTR register), allowing operating FLASH Accelerator trace
buffer function by this register will further improve the performance.
bit
7
6
5
4
3
2
1
0
Field
Reserved
BS
BE
Attribute
R
RW
Initial value
0
0
[bit7:2] Reserved bits
The read values are undefined. Ignored on write.
[bit1] BS: Buffer Status
Field
bit
Description
BS
1
Buffer Status
0: Trace buffer function is in stop or in initializing.
1: Trace buffer function operation is allowed.
[bit0] BE: Buffer Enable
Field
bit
Description
BE
0
Buffer Enable
0: Trace buffer function will be stopped.
1: Trace buffer function operation is allowed.
After the trace buffer function operation is allowed (after "1" is written to BE bit), trace buffer initialization will be started.
After HCLK × 1025 cycles, the initialization will be completed and the trace buffer enters into operation. BS bit will be set
to "1" at this time.
The prefetch buffer will still be functioning while initializing the trace buffer (BE = “1” and BS = “0”), allowing access to the
flash memory. When changed to BS =”1” and the trace buffer is in operation, the trace buffer will automatically start tracing.
