EP9315-CB Cirrus Logic Inc, EP9315-CB Datasheet - Page 645

• 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

19.1 Registers
Register Descriptions
Watchdog
DS785UM1
31
15
Address:
Default:
Definition:
Bit Descriptions:
30
14
Note: A software reset can reset the system without this register losing its contents.
Note: Watchdog registers are intended to be word-accessed only. Since the least significant
0x8094_0000
0x8094_0004
29
13
Address
bytes of the address bus are not decoded, byte and half word accesses are not allowed
and may have unpredictable results.
28
12
CTL
27
11
0x8094_0000 - Read/Write
0x0000_0000
Watchdog control register.
RSVD:
WRITE ONLY BIT FIELDS
CTL:
"Watchdog"
"WDStatus"
Name
26
10
Table 19-1. Watchdog Timer Register Memory Map
25
9
SW locked
24
8
No
No
Copyright 2007 Cirrus Logic
Reserved. Unknown during read.
Watchdog control bits. The ARM Core writes 0x5555 to
this half-word to periodically restart the watchdog timer.
Writing 0xAA55 to this hword will disable the watchdog
timer. Writing 0xAAAA to this hword will re-enable the
watchdog timer.
23
7
Read/Write
Read/Write
CTL/PLSDSN
Type
RSVD
22
6
CTL/OVRID
16/3 bits
7 bits
Size
21
5
CTL/SWDIS
Watchdog Status Storage Register
20
4
Watchdog Control Register
Description
CTL/HWDIS
19
3
CTL/URST
EP93xx User’s Guide
18
2
Watchdog Timer
CTL/3KRST
17
1
CTL/WD
19-3
16
0
19