LPC1112FHN33/203,5 NXP Semiconductors, LPC1112FHN33/203,5 Datasheet - Page 231

• Manufacturer Part Number: LPC1112FHN33/203,5
• Description: ARM Microcontrollers - MCU Cortex-M0 16kB flash up to 4 kB SRAM
• Manufacturer: NXP Semiconductors

Specifications of LPC1112FHN33/203,5

• Rohs: yes
• Core: ARM Cortex M0
• Processor Series: LPC1112
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 16 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 3.6 V
• Operating Temperature Range: - 65 C to + 150 C
• Package / Case: HVQFN-33
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 260

NXP Semiconductors
UM10398
User manual
14.7.3.1 Setup and hold time requirements on CS with respect to SK in Microwire
turn latches each bit on the rising edge of SK. At the end of the frame, for single transfers,
the CS signal is pulled HIGH one clock period after the last bit has been latched in the
receive serial shifter, that causes the data to be transferred to the receive FIFO.
Note: The off-chip slave device can tristate the receive line either on the falling edge of
SK after the LSB has been latched by the receive shiftier, or when the CS pin goes HIGH.
For continuous transfers, data transmission begins and ends in the same manner as a
single transfer. However, the CS line is continuously asserted (held LOW) and
transmission of data occurs back to back. The control byte of the next frame follows
directly after the LSB of the received data from the current frame. Each of the received
values is transferred from the receive shifter on the falling edge SK, after the LSB of the
frame has been latched into the SPI/SSP.
mode
In the Microwire mode, the SPI/SSP slave samples the first bit of receive data on the
rising edge of SK after CS has gone LOW. Masters that drive a free-running SK must
ensure that the CS signal has sufficient setup and hold margins with respect to the rising
edge of SK.
Figure 43
edge on which the first bit of receive data is to be sampled by the SPI/SSP slave, CS must
have a setup of at least two times the period of SK on which the SPI/SSP operates. With
respect to the SK rising edge previous to this edge, CS must have a hold of at least one
SK period.
Fig 43. Microwire frame format setup and hold details
illustrates these setup and hold time requirements. With respect to the SK rising
All information provided in this document is subject to legal disclaimers.
CS
SK
SI
Rev. 12 — 24 September 2012
Chapter 14: LPC111x/LPC11Cxx SPI0/1 with SSP
t
HOLD
= t
SK
t
SETUP
=2*t
SK
UM10398
© NXP B.V. 2012. All rights reserved.
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