參數(shù)資料
型號(hào): MFR4310E1MAE40R
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 2 CHANNEL(S), 10M bps, SERIAL COMM CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, 0.50 PITCH, LEAD FREE, MS-026BCD, LQFP-64
文件頁(yè)數(shù): 211/268頁(yè)
文件大小: 1718K
代理商: MFR4310E1MAE40R
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Device Overview
MFR4310 Reference Manual, Rev. 1
Freescale Semiconductor
47
2. Assert the external hard reset signal of the CC again.
2.6.3
Recommended Pullup/pulldown Resistor Values
As the IF_SEL[1:0] signals share pins with Physical Layer Interface signals, pullup and pulldown resistors
should be used for the selection. The recommended pullup/pulldown resistor values for the IF_SEL[1:0]
inputs are given in Table 2-7:
2.7
External Host Interface
The MFR4310 can be connected through three types of bus interface (see Section 2.6.2, “External Host
Interface Selection” for information on how to select the host interface). The three types of microprocessor
interface are described below.
2.7.1
Asynchronous Memory Interface
Figure 2-5 shows how to connect the CC to a microcontroller using the AMI interface.
Data exchange in AMI Mode is controlled by the CE#, WE# and OE# signals.
The AMI interface is implemented as an asynchronous memory slave module, thus enabling fast
interfacing between the CC and a variety of microcontrollers.
The AMI interface decodes its internal register addresses with the help of the chip select signal CE#
and the address lines A[12:1].
The AMI interface accepts only aligned 16-bit read and 8-bit or 16-bit write transactions. The AMI
interface does not support 8-bit read accesses.
— The byte selects BSEL[1:0]#, the chip enable CE#, the output enable OE#, and the write enable
WE# are used to determine the type of access as shown in Table 2-8.
Table 2-7. Recommended Pullup and Pulldown Resistor Values for IF_SEL[1:0] Inputs
IO, Regulator and analog supply level
(VDD5)
Pullup resistor1
1 The listed values are calculated for the MFR4310-Physical Layer connection where no internal pullup/pulldown
resistors are assumed in the Electrical PHY at the TXD_BG1 and TXD_BG2 interface lines. If an Electrical PHY
device has internal pullup/pulldown resistors connected to these signals, then the external pullup/pulldown resistor
values must be recalculated to ensure that VIL requirements for pulldown resistors or VIH requirements for pullup
resistors for the chosen VDD5 are met. See Section A.1.9, “I/O Characteristics” for more details on VIL, VIH and VDD5.
Pulldown resistor1
Units
3.3V
16
47
k
Ω
5V
10
47
k
Ω
Table 2-8. AMI Access Types
CE#
WE#
OE#
BSEL1#
BSEL0#
Type of Access
0
X
Illegal
0
1
0
16-bit write to word address1
0
1
0
1
8-bit write to even byte address2
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