C8051F581-IMR Silicon Labs, C8051F581-IMR Datasheet - Page 146

• Manufacturer Part Number: C8051F581-IMR
• Description: 8-bit Microcontrollers - MCU 50MIPS 128kB 8kB SPI
• Manufacturer: Silicon Labs

Specifications of C8051F581-IMR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

C8051F58x/F59x
SFR Definition 15.4. CCH0CN: Cache Control
SFR Address = 0xE3; SFR Page = 0x0F
SFR Definition 15.5. ONESHOT: Flash Oneshot Period
SFR Address = 0xBE; SFR Page = 0x0F
146
Name Reserved
Reset
Name
Reset
7:6
4:1
7:4
3:0
Bit
Bit
Type
Type
5
0
Bit
Bit
PERIOD[3:0] Oneshot Period Control Bits.
Reserved
Reserved
CHBLKW
CHPFEN
Name
Unused
Name
R/W
R
7
0
7
0
Must Write 00b
Cache Prefect Enable Bit.
0: Prefetch engine is disabled.
1: Prefetch engine is enabled.
Must Write 0000b.
Block Write Enable Bit.
This bit allows block writes to Flash memory from firmware.
0: Each byte of a software Flash write is written individually.
1: Flash bytes are written in groups of two.
Reserved
Read = 0000b. Write = don’t care.
These bits limit the internal Flash read strobe width as follows. When the Flash read
strobe is de-asserted, the Flash memory enters a low-power state for the remainder
of the system clock cycle. These bits have no effect when the system clocks is
greater than 12.5 MHz and FLRT = 0.
R/W
R
6
0
6
0
CHPFEN
R/W
R
5
1
5
0
FLASH
Reserved
R/W
Rev. 1.2
R
4
0
4
0
RDMAX
Function
Reserved
Function
=
R/W
R/W
5ns
3
0
3
1
+

PERIOD 5ns
Reserved
R/W
R/W
2
0
2
1
PERIOD[3:0]


Reserved
R/W
R/W
1
0
1
1
CHBLKW
R/W
R/W
0
0
0
1