参数资料
型号: 73S1215F-44IM/F
厂商: Maxim Integrated Products
文件页数: 109/136页
文件大小: 0K
描述: IC SMART CARD READER 44-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 260
系列: 73S12xx
核心处理器: 80515
芯体尺寸: 8-位
速度: 24MHz
连通性: I²C,智能卡,UART/USART,USB
外围设备: LED,POR,WDT
输入/输出数: 9
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-VFQFN 裸露焊盘
包装: 管件
73S1215F Data Sheet
DS_1215F_003
1.7.14.1 USB Interface Implementation
The 73S1215F Application Programming Interface includes some dedicated software commands to
configure the USB interface, to get a status of each USB Endpoint, to stall / unstall portions of the USB,
and to send / receive data to / from each endpoint.
USB API entirely manages the USB circuitry, the USB registers and the FIFOs. Use of those commands
facilitates USB implementation, without dealing with low-level programming.
Miscellaneous Control Register 1 (MISCtl1): 0xFFF2
0x10
Table 78: The MISCtl1 Register
MSB
LSB
FRPEN
FLSH66
ANAPEN USBPEN USBCON
Bit
Symbol
Function
MISCtl1.7
MISCtl1.6
MISCtl1.5
FRPEN
Flash Read Pulse enable.
MISCtl1.4
FLSH66
Flash Read Pulse.
MISCtl1.3
MISCtl1.2
ANAPEN
Analog power enable.
MISCtl1.1
USBPEN
0 = Enable the USB differential transceiver.
MISCtl1.0
USBCON
1 = Connect pull-up resistor from VDD to D+. If connected, the USB
host will recognize the attachment of a USB device and begin
enumeration.
Note: When using the USB on the 73S1215F, external 24 series resistors must be added to the D+ and
D- signals to provide the proper impedance matching on these pins.
The USB peripheral block is not able to support read or write operations to the USB SFR registers when
the MPU clock is running at MPU clock rates of 12MHz or greater. In order to properly communicate with
the USB SFR registers when running at these speeds, wait states must be inserted when addressing the
USB SFRs. The CKCON register allows wait states to be inserted when accessing these registers. The
proper settings for the number of wait states are shown in Error! Reference source not found..
When changing the MPU clock rate or the number of wait states, the USB connection
must be inactive. If the USB is active, then it must be inactivated before changing the
MPU clock or number of wait states. It can then be reconnected and re-enumerated.
Changing these parameters while the USB interface is active may cause communication errors on
the USB interface.
74
Rev. 1.4
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