C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 212
C8051F321R
Manufacturer Part Number
C8051F321R
Description
IC 8051 MCU 16K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheet
1.C8051F320R.pdf
(256 pages)
Specifications of C8051F321R
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
21
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 13x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1067-2
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C8051F320/1
212
Bits 7-0: SCR7-SCR0: SPI0 Clock Rate.
Example: If SYSCLK = 2 MHz and SPI0CKR = 0x04,
f
SCK
f
SCR7
SCK
R/W
Bit7
=
=
These bits determine the frequency of the SCK output when the SPI0 module is configured for master
mode operation. The SCK clock frequency is a divided version of the system clock, and is given in the
following equation, where SYSCLK is the system clock frequency and SPI0CKR is the 8-bit value
held in the SPI0CKR register.
for 0 <= SPI0CKR <= 255
200kHz
f
SCK
------------------------- -
2
2000000
×
SCR6
R/W
Bit6
(
=
4
+
------------------------------------------------ -
2
×
1
Figure 18.10. SPI0CKR: SPI0 Clock Rate Register
)
(
SPI0CKR
SCR5
SYSCLK
R/W
Bit5
SCR4
+
R/W
Bit4
1
)
Rev. 1.1
SCR3
R/W
Bit3
SCR2
R/W
Bit2
SCR1
R/W
Bit1
SFR Address: 0xA2
SCR0
R/W
Bit0
00000000
Reset Value
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