EP9315-CB Cirrus Logic Inc, EP9315-CB Datasheet - Page 128

• 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

5
5-2
System Controller
EP93xx User’s Guide
5.1.3 Hardware Configuration Control
“Watchdog” on page 19-3
regarding which reset event occurred. Note that only the Watchdog timer contains
information about a user-generated 3-key reset.
The Hardware Configuration controls provide a mechanism to place the system into various
boot configurations. In addition, one of several external boot memory options can be selected
at system wake up.
The Hardware Configuration controls are defined by a set of device pins that are latched into
configuration control bits on the rising edge of the PRSTn or RSTOn pin. The different
hardware configuration bits define watchdog behavior, boot mode (internal or external), boot
synchronicity, and external boot width. The latched pins are described in
The latched version of these signals have an “L” prefix, are stored in the SysCfg register, and
are readable by software. Note that the signals EECLK and EEDAT may have 1 kΩ pull-up
resisters if used in an open-drain two-wire serial port application. (The default state
assignments will assume these pull-ups.)
The Hardware Control configurations are show in
Note: If PLLs are enabled, user reset does NOT disable or reset the PLLs. They retain their
• Three-key reset. When F2, F4, and F7 are pressed, a user reset occurs.
• Software reset and watchdog reset. They perform the functions of the user reset, but are
certain system variables such as RTC, SDRAM refresh control/global configuration, and
the Syscon registers.
under software control.
frequency settings.
Table 5-1. Hardware Configuration Control Latched Pins
CSn[1]
CSn[2]
CSn[3]
EECLK
EEDAT
BOOT[1:0]
ASDO
CSn[7:6]
Pin Name(s)
and
Copyright 2007 Cirrus Logic
“PwrSts” on page 5-14
Enable/Disable Watchdog
reset timer
reset duration
boot
asynchronous boot
Enable/Disable Watchdog
Should be pulled-up to “1”
Select internal or external
Should be pulled-up to “1”
Select boot mode
Select synchronous or
Select external boot width
Action
Table
registers contain the information
5-2.
Table
5-1.
DS785UM1