C8051F045R Silicon Labs, C8051F045R Datasheet - Page 142

• Manufacturer Part Number: C8051F045R
• Description: 8-bit Microcontrollers - MCU 25 MIPS 64KB 10ADC
• Manufacturer: Silicon Labs

Specifications of C8051F045R

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 4.25 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 3.6 V
• Package / Case: TQFP-64
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 13
• Data Rom Size: 64 KB
• Interface Type: CAN, SMBus, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Processor Series: C8051
• Program Memory Type: Flash
• Factory Pack Quantity: 500
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

C8051F040/1/2/3/4/5/6/7
142
Bits7-1:
Bit0:
Bits7-0:
R/W
Bit7
Bit7
R
-
Reserved.
SFRPGEN: SFR Automatic Page Control Enable.
Upon interrupt the C8051 Core will vector to the specified interrupt service routine and auto-
matically switch the SFR page to the corresponding peripheral or function’s SFR page. This
bit is used to control this autopaging function.
0: SFR Automatic Paging disabled. C8051 core will not automatically change to the appro-
priate SFR page (i.e., the SFR page that contains the SFR’s for the peripheral/function that
was the source of the interrupt).
1: SFR Automatic Paging enabled. Upon interrupt, the CIP-51 will switch the SFR page to
the page that contains the SFR’s for the peripheral or function that is the source of the inter-
rupt.
SFRPAGE: SFR Page Register.
Byte represents the SFR page the CIP-51 uses when reading or modifying SFR’s.
SFR page context is retained upon interrupts/return from interrupts in a 3 byte SFR Page
Stack: SFRPAGE is the first entry, SFRNEXT is the second, and SFRLAST is third entry.
The SFRPAGE, SFRSTACK, and SFRLAST bytes may be used alter the context in the SFR
Page Stack. Only interrupts and returns from interrupt service routines push and pop the
SFR Page Stack. (See
Write:
Sets the SFR Page
Read:
Byte is the SFR page the CIP-51 MCU is using.
SFR Definition 12.1. SFR Page Control Register: SFRPGCN
R/W
Bit6
Bit6
R
-
SFR Definition 12.2. SFR Page Register: SFRPAGE
R/W
Bit5
Bit5
R
-
Section 12.2.6.2
R/W
Bit4
Bit4
R
-
Rev. 1.5
R/W
Bit3
Bit3
R
-
and
Section 12.2.6.3
R/W
Bit2
Bit2
R
-
R/W
Bit1
Bit1
R
for further information.)
-
SFRPGEN 00000001
SFR Address:
SFR Address:
SFR Page:
SFR Page:
R/W
R/W
Bit0
Bit0
0x81
All Pages
0x84
All Pages
Reset Value
00000000
Reset Value