参数资料
型号: 73S1209F-68IM/F/P
厂商: Maxim Integrated Products
文件页数: 60/123页
文件大小: 0K
描述: IC SMART CARD READER PROG 68-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
外围设备: LED,POR,WDT
输入/输出数: 9
程序存储器容量: 32KB(32K 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: 68-VFQFN 裸露焊盘
包装: 管件
DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
41
Miscellaneous Control Register 0 (MISCtl0): 0xFFF1
0x00
Transmit and receive (TX and RX) pin selection and loop back test configuration are set up via this register.
Table 37: The MISCtl0 Register
MSB
LSB
PWRDN
SLPBK
SSEL
Bit
Symbol
Function
MISCtl0.7
PWRDN
This bit places the 73S1209F into a power down state.
MISCtl0.6
MISCtl0.5
MISCtl0.4
MISCtl0.3
MISCtl0.2
MISCtl0.1
SLPBK
1 = UART loop back testing mode. The pins TXD and RXD are to be
connected together externally (with SLPBK =1) and therefore:
SLPBK SSEL
Mode
0
normal using Serial_0
0
1
normal using Serial_1
1
0
Serial_0 TX feeds Serial_1 RX
1
Serial_1 TX feeds Serial_0 RX
MISCtl0.0
SSEL
Selects either Serial_1 if set =1 or Serial_0 if set = 0 to be connected
to RXD and TXD pins.
1.7.4.1
Serial Interface 0
The Serial Interface 0 can operate in four modes:
Mode 0
Pin RX serves as input and output. TX outputs the shift clock. Eight bits are transmitted with the LSB
first. The baud rate is fixed at 1/12 of the crystal frequency. Reception is initialized in Mode 0 by
setting the flags in S0CON as follows: RI0 = 0 and REN0 = 1. In other modes, a start bit when REN0
= 1 starts receiving serial data.
Mode 1
Pin RX serves as input, and TX serves as serial output. No external shift clock is used, 10 bits are
transmitted: a start bit (always 0), 8 data bits (LSB first), and a stop bit (always 1). On receive, a start
bit synchronizes the transmission, 8 data bits are available by reading S0BUF, and stop bit sets the
flag RB80 in the Special Function Register S0CON. In mode 1 either internal baud rate generator or
timer 1 can be use to specify baud rate.
Mode 2
This mode is similar to Mode 1, with two differences. The baud rate is fixed at 1/32 or 1/64 of
oscillator frequency and 11 bits are transmitted or received: a start bit (0), 8 data bits (LSB first), a
programmable 9th bit, and a stop bit (1). The 9th bit can be used to control the parity of the serial
interface: at transmission, bit TB80 in S0CON is output as the 9th bit, and at receive, the 9th bit
affects RB80 in Special Function Register S0CON.
Mode 3
The only difference between Mode 2 and Mode 3 is that in Mode 3 either internal baud rate generator
or timer 1 can be use to specify baud rate.
The S0BUF register is used to read/write data to/from the serial 0 interface.
相关PDF资料
PDF描述
73S1209F-44IMR/F/P IC SMART CARD READER PROG 44-QFN
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