参数资料
型号: 73S1209F-68IM/F/P
厂商: Maxim Integrated Products
文件页数: 64/123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
45
Table 42: Timers/Counters Mode Description
M1
M0
Mode
Function
0
Mode 0
13-bit Counter/Timer.
0
1
Mode 1
16-bit Counter/Timer.
1
0
Mode 2
8-bit auto-reload Counter/Timer.
1
Mode 3
If Timer 1 M1 and M0 bits are set to '1', Timer 1 stops. If Timer 0 M1
and M0 bits are set to '1', Timer 0 acts as two independent 8-bit
Timer/Counters.
Mode 0
Putting either timer/counter into mode 0 configures it as an 8-bit timer/counter with a divide-by-32
prescaler. In this mode, the timer register is configured as a 13-bit register. As the count rolls over from
all 1’s to all 0’s, it sets the timer overflow flag TF0. The overflow flag TF0 then can be used to request an
interrupt. The counted input is enabled to the timer when TRx = 1 and either GATE = 0 or TX = 1 (setting
GATE = 1 allows the timer to be controlled by external input TX, to facilitate pulse width measurements).
TRx are control bits in the special function register TCON; GATE is in TMOD. The 13-bit register consists
of all 8 bits of TH1 and the lower 5 bits of TL0. The upper 3 bits of TL0 are indeterminate and should be
ignored. Setting the run flag (TRx) does not clear the registers. Mode 0 operation is the same for timer 0
as for timer 1.
Mode 1
Mode 1 is the same as mode 0, except that the timer register is run with all 16 bits.
Mode 2
Mode 2 configures the timer register as an 8-bit counter (TLx) with automatic reload. The overflow from
TLx not only sets TFx, but also reloads TLx with the contents of THx, which is preset by software. The
reload leaves THx unchanged.
Mode 3
Mode 3 has different effects on timer 0 and timer 1. Timer 1 in mode 3 simply holds its count. The effect
is the same as setting TR1 = 0. Timer 0 in mode 3 establishes TL0 and TH0 as two separate counters.
TL0 uses the timer 0 control bits: C/T, GATE, TR0, INT0, and TF0. TH0 is locked into a timer function
(counting machine cycles) and takes over the use of TR1 and TF1 from timer 1. Thus, TH0 now controls
the "timer 1" interrupt. Mode 3 is provided for applications requiring an extra 8-bit timer or counter. When
timer 0 is in mode 3, timer 1 can be turned on and off by switching it out of and into its own mode 3, or
can still be used by the serial channel as a baud rate generator, or in fact, in any application not requiring
an interrupt from timer 1 itself.
相关PDF资料
PDF描述
73S1209F-44IMR/F/P IC SMART CARD READER PROG 44-QFN
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