參數(shù)資料
型號(hào)： 73S1209F-68IMR/F/P
廠商： Maxim Integrated Products
文件頁數(shù)： 86/123頁
文件大小： 0K
描述： IC SMART CARD READER PROG 68-QFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
系列： 73S12xx
核心處理器： 80515
芯體尺寸： 8-位
速度： 24MHz
連通性： I²C，智能卡，UART/USART
外圍設(shè)備： LED，POR，WDT
輸入/輸出數(shù)： 9
程序存儲(chǔ)器容量： 32KB（32K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 2K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-VFQFN 裸露焊盤
包裝： 帶卷 (TR)
DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
65
Keypad Scan Time Register (KSCAN): 0xD3
0x00
This register contains the values of scanning time and debouncing time.
Table 67: The KSCAN Register
MSB
LSB
DBTIME.5 DBTIME.4 DBTIME.3 DBTIME.2 DBTIME.1 DBTIME.0 SCTIME.1 SCTIME.0
Bit
Symbol
Function
KSCAN.7
DBTIME.5
De-bounce time in 4ms increments. 1 = 4ms de-bounce time, 0x3F =
252ms, 0x00 = 256ms. Key presses and key releases are de-bounced by
this amount of time.
KSCAN.6
DBTIME.4
KSCAN.5
DBTIME.3
KSCAN.4
DBTIME.2
KSCAN.3
DBTIME.1
KSCAN.2
DBTIME.0
KSCAN.1
SCTIME.1
Scan time in ms. 01 = 1ms, 02 = 2ms, 00 = 3ms, 00 = 4ms. Time between
checking each key during keypad scanning.
KSCAN.0
SCTIME.0
Keypad Control/Status Register (KSTAT): 0xD4
0x00
This register is used to control the hardware keypad scanning and detection capabilities, as well as the
keypad interrupt control and status.
Table 68: The KSTAT Register
MSB
LSB
–
KEYCLK HWSCEN KEYDET KYDTEN
Bit
Symbol
Function
KSTAT.7
–
KSTAT.6
–
KSTAT.5
–
KSTAT.4
–
KSTAT.3
KEYCLK
The current state of the keyboard clock can be read from this bit.
KSTAT.2
HWSCEN
Hardware Scan Enable – When set, the hardware will perform automatic
key scanning. When cleared, the firmware must perform the key scanning
manually (bypass mode).
KSTAT.1
KEYDET
Key Detect – When HWSCEN = 1 this bit is set causing an interrupt that
indicates a valid key press was detected and the key location can be read
from the Keypad Column and Row registers. When HWSCEN = 0, this bit
is an interrupt which indicates a falling edge on any Row input if all Row
inputs had been high previously (note: multiple Key Detect interrupts may
occur in this case due to the keypad switch bouncing). In all cases, this bit
is cleared when read. When HWSCEN = 0 and the keypad interface 1kHz
clock is disabled, a key press will still set this bit and cause an interrupt.
KSTAT.0
KYDTEN
Key Detect Enable – When set, the KEYDET bit can cause an interrupt and
when cleared the KEYDET cannot cause an interrupt. KEYDET can still
get set even if the interrupt is not enabled.
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73S1209F-EB 功能描述:開發(fā)板和工具包 - 8051 73S1209F Eval Brd (Doc. Cd, Cable) RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓:
73S1209F-IM44 DK 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 73S1209F Dev Kit Eval Bd Ice Cable Cd
73S1209F-IM44 EB 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 73S1209F Eval Brd Eval Bd Doc Cd Cable
73S1209F-IM68 DK 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 73S1209F Dev Kit Eval Bd Ice Cable Cd
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