73S1210F-68IM/F Maxim Integrated Products, 73S1210F-68IM/F Datasheet - Page 63

• Manufacturer Part Number: 73S1210F-68IM/F
• Description: IC SMART CARD READER 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 73S1210F-68IM/F

• Core Processor: 80515
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: I²C, SmartCard, UART/USART
• Peripherals: LED, POR, WDT
• Number Of I /o: 8
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

DS_1210F_001
Rev. 1.4
No
KORDERL / H Registers:
Column Scan Order
still released ?
Yes
Deboucing
the key(s)
Is (are)
Timer
(*)
1 key
More
than
Figure 13: Keypad Interface Flow Chart
No
Yes
Debouncing Time
KSCAN Register:
Download of the key row and
column values in KROW and
(*) Key release is cheked by looking for a low level on any row.
Keypad Scanning
Keypad Interrupt
keys have been
KCOL registers
Input still = 0 ?
Initialization
Outputs = 0
All Column
Input = 0 ?
Deboucing
How Many
generation
released ?
detected?
the key(s)
Any Row
Keypad
Is (are)
Timer
1 key
Row
Any
Yes
(*)
No
0 key
No
KSCAN Register:
Debouncing Time
Keypad Size Definition
Enable Keypad Interrupt
KSCAN Register:
Enable HW Scanning
KSIZE Register:
Scanning Rate
KSTAT Register:
Value of the valid key column
Key Detect Interrupt
KSTAT Register:
Value of the valid key row
Register Used to Control the
hardware keypad interface
Register written by the
hardware keypad interface
KROW Register:
KCOL Register:
73S1210F Data Sheet
63