參數(shù)資料
型號: 73S1209F-EB
廠商: Maxim Integrated Products
文件頁數(shù): 84/123頁
文件大小: 0K
描述: BOARD EVAL 73S1209F DOC/CD CABLE
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 1
主要目的: *
嵌入式: *
已用 IC / 零件: *
主要屬性: *
次要屬性: *
已供物品: 板,線纜,CD,電源
DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
63
Figure 12: Keypad Interface Flow Chart
Any
Row
Input = 0 ?
Keypad
Initialization
All Column
Outputs = 0
Deboucing
Timer
Any Row
Input still = 0 ?
Yes
No
How Many
keys have been
detected?
Download of the key row and
column values in KROW and
KCOL registers
1 key
Keypad Interrupt
generation
Is (are)
the key(s)
released ?
(*)
Deboucing
Timer
Yes
Is (are)
the key(s)
still released ?
(*)
No
KSCAN Register:
Debouncing Time
KSTAT Register:
Enable HW Scanning
Enable Keypad Interrupt
Keypad Scanning
KORDERL / H Registers:
Column Scan Order
KSTAT Register:
Key Detect Interrupt
Yes
KCOL Register:
Value of the valid key column
KROW Register:
Value of the valid key row
KSCAN Register:
Scanning Rate
KSIZE Register:
Keypad Size Definition
0 key
Register Used to Control the
hardware keypad interface
Register written by the
hardware keypad interface
More
than
1 key
KSCAN Register:
Debouncing Time
(*) Key release is cheked by looking for a low level on any row.
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