C8051F544-IQR Silicon Labs, C8051F544-IQR Datasheet - Page 226

• Manufacturer Part Number: C8051F544-IQR
• Description: 8-bit Microcontrollers - MCU 50 MIPS 8 kB 1kB LIN 2.1 SPI UART I2C
• Manufacturer: Silicon Labs

Specifications of C8051F544-IQR

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

C8051F54x
226
Master Mode Timing
T
T
T
T
Slave Mode Timing
T
T
T
T
T
T
T
T
T
T
*Note: T
MCKH
MCKL
MIS
MIH
SE
SD
SEZ
SDZ
CKH
CKL
SIS
SIH
SOH
SLH
Parameter
SYSCLK
SCK High Time
SCK Low Time
MISO Valid to SCK Shift Edge
SCK Shift Edge to MISO Change
NSS Falling to First SCK Edge
Last SCK Edge to NSS Rising
NSS Falling to MISO Valid
NSS Rising to MISO High-Z
SCK High Time
SCK Low Time
MOSI Valid to SCK Sample Edge
SCK Sample Edge to MOSI Change
SCK Shift Edge to MISO Change
Last SCK Edge to MISO Change 
(CKPHA = 1 ONLY)
is equal to one period of the device system clock (SYSCLK).
*
*
(See Figure 22.10 and Figure 22.11)
(See Figure 22.8 and Figure 22.9)
Table 22.1. SPI Slave Timing Parameters
Description
Rev. 1.1
1 x T
1 x T
1 x T
2 x T
2 x T
5 x T
5 x T
2 x T
2 x T
6 x T
SYSCLK
Min
SYSCLK
SYSCLK
SYSCLK
SYSCLK
—
—
SYSCLK
SYSCLK
SYSCLK
SYSCLK
—
SYSCLK
0
+ 20
4 x T
4 x T
4 x T
8 x T
Max
—
—
—
—
—
—
SYSCLK
SYSCLK
—
—
—
—
SYSCLK
SYSCLK
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns