EP9312-IB Cirrus Logic Inc, EP9312-IB Datasheet - Page 517

• Manufacturer Part Number: EP9312-IB
• Description: IC ARM920T MCU 200MHZ 352-PBGA
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-IB

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, 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: -40°C ~ 85°C
• Package / Case: 352-BGA
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1259

BootSts
DS785UM1
31
15
Definition:
Bit Descriptions:
Address: 0x8006_000C - Read Only
Default: 0x0000_0000
Definition:
Bit Descriptions:
30
14
29
13
28
12
The Refresh Timer register is used to specify the period between refresh
cycles.
RSVD:
Refcnt:
When power on reset is asserted, the values of the boot mode option pins
shown in
latched values. This register can be read to determine which memory
configuration was used during the boot process.
RSVD:
ASDO:
Width:
27
11
Table 13-1
26
10
RSVD
Copyright 2007 Cirrus Logic
25
9
Reserved. - Unknown During Read
Refresh Count - Read/Write
The value written to this field specifies, in multiples of the
period of HCLK, the time period between refresh cycles.
For example, if the period of HCLK is 20 ns, this field
should be written to 0x320 (decimal 800) to generate a
16 ms refresh period. On reset, this field defaults to
0x0080 (decimal 128) to generate a 2.56 ms refresh
period, but it must be written during the SDRAM
initialization routine to the appropriate value for the
SDRAM devices. If this field is written to 0x0000, no
refresh cycles are issued.
Reserved - Unknown During Read
Latched ASDO pin value - Read Only
Boot Media:
1 - SyncROM or SyncFLASH
0 - Asynchronous ROM
Boot memory bus Width - Read Only
are latched. The Boot Status register reflects those
24
8
RSVD
23
7
22
6
SDRAM, SyncROM, and SyncFLASH Controller
21
5
20
4
19
3
Latched
EP93xx User’s Guide
ASDO
18
2
17
1
Width
13-21
16
0
13