EP9315-CB Cirrus Logic Inc, EP9315-CB Datasheet - Page 766

• Manufacturer Part Number: EP9315-CB
• Description: IC ARM920T MCU 200MHZ 352-PBGA
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9315-CB

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, PCMCIA, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 352-BGA
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: EDB9315A-Z
• For Use With: 598-1144 - KIT DEVELOPMENT EP9315 ARM9
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1261

26
26-4
Keypad Interface
EP93xx User’s Guide
The ignored addresses, 0x18 and 0x1B, are greater than the addresses of the two keys
detected. The following controller actions occur:
• No press for address 0x1B at (ROW3, COL3)
• ROW0 is driven low.
• When ROW0 is low, COL0 and COL3 are also low due to the current paths formed by
• During the time that ROW1 is low each of the columns (COL0 through COL7) is
• Since COL0 is low the key 0x00 appears to be pressed.
the keys pressed.
scanned.
ROW 1
ROW 5
ROW 0
ROW 3
ROW 4
ROW 7
ROW 2
ROW 6
KEY 00H
KEY 20H
KEY 08H
KEY 10H
KEY 28H
KEY 30H
KEY 18H
KEY 38H
COL 0
KEY 01H
KEY 09H
KEY 11H
KEY 21H
KEY 29H
KEY 31H
KEY 19H
KEY 39H
COL 1
KEY 02H
KEY 22H
KEY 0AH
KEY 12H
KEY 2AH
KEY 32H
KEY 1AH
KEY 3AH
Figure 26-3. Apparent Key 00H
COL 2
Copyright 2007 Cirrus Logic
KEY 03H
KEY 23H
KEY 0BH
KEY 13H
KEY 1BH
KEY 2BH
KEY 33H
KEY 3BH
COL 3
KEY 04H
KEY 0CH
KEY 24H
KEY 2CH
KEY 14H
KEY 1CH
KEY 34H
KEY 3CH
COL 4
COL 5
KEY 05H
KEY 0DH
KEY 25H
KEY 2DH
KEY 15H
KEY 1DH
KEY 35H
KEY 3DH
KEY 06H
KEY 0EH
KEY 16H
KEY 26H
KEY 2EH
KEY 36H
KEY 1EH
KEY 3EH
COL 6
COL 7
KEY 07H
KEY 1FH
KEY 27H
KEY 2FH
KEY 17H
KEY 1FH
KEY 37H
KEY 3FH
DS785UM1