参数资料
型号: MC13214R2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, BGA71
封装: 9 X 9 MM, 1 MM HEIGHT, ROHS COMPLIANT, LGA-71
文件页数: 6/70页
文件大小: 802K
代理商: MC13214R2
MC13211/212/213/214 Technical Data, Rev. 0.0,
14
Freescale Semiconductor
3
MC1321x Serial Peripheral Interface (SPI)
The MC1321x modem and CPU communicate primarily through the onboard SPI command channel.
Figure 4 shows the SiP internal interconnects with the SPI bus highlighted. The MCU has a single SPI
module that is dedicated to the modem SPI interface. The modem is a slave only and the MCU SPI must
be programmed and used as a master only. Further, the SPI performance is limited by the modem
constraints of 8 MHz SPI clock frequency, and use of the SPI must be programmed to meet the modem
SPI protocol.
3.1
SiP Level SPI Pin Connections
The SiP level SPI pin connections are all internal to the device. Figure 4 shows the SiP interconnections
with the SPI bus highlighted.
Figure 4. MC1321x Internal Interconnects Highlighting SPI Bus
Table 4. MC1321x Internal SPI Connections
MCU Signal
Modem Signal
Description
PTE5/SPSCK1
SPICLK
MCU SPI master SPI clock output drives modem SPICLK slave clock input.
PTE4/MOSI1
MOSI
MCU SPI master MOSI output drives modem slave MOSI input
PTE3/MISO1
MISO
Modem SPI slave MISO output drives MCU master MISO input
PTE2/SS1
CE
MCU SPI master SS output drives modem slave CE input
M_RST
PTD3
M_IRQ
ATTN
RXTXEN
GPIO1/Out_of_Idle
GPIO2/CRC_Valid
MOSI
MISO
SPICLK
IRQ
PTD0
PTD1
PTE7
PTE6
PTE4/MOSI1
PTE3/MISO1
PTE5/SPSCK1
CE
PTE2/SS1
MODEM
MCU
RESET
47
44
43
11
MC1321x
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