C8051F93X-C8051F92X View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

C8051F93X-C8051F92X

Single/Dual Battery, 0.9–3.6 V, 64/32 kB, SmaRTClock, 10-Bit ADC MCU

Silicon Laboratories 

C8051F93x-C8051F92x

SFR Definition 24.3. SPInCKR: SPI Clock Rate

Bit

7

6

5

4

3

2

1

0

Name

SCRn[7:0]

Type

R/W

Reset

0

0

0

0

0

0

0

0

SFR Addresses: SPI0CKR = 0xA2, SPI1CKR = 0x85 

SFR Pages: SPI0CKR = 0x0, SPI1CKR = 0x0

Bit

Name

Function

7:0

SCRn

SPI Clock Rate.

These bits determine the frequency of the SCK output when the SPI 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 SPInCKR is the 8-bit value held in the SPInCKR

register.

fSCK = 2------------S----P---SI--n-Y--C--S--K--C--R--L--[-K-7---:--0---]---+-----1----

for 0 <= SPI0CKR <= 255

Example: If SYSCLK = 2 MHz and SPInCKR = 0x04,

fSCK = 2---2---0---0---40---0--+-0---0-1---

fSCK = 200kHz

278

Rev. 1.3

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