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| 型號： | EP7211 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER |
| 中文描述： | 高性能超低功耗系統(tǒng)與LCD控制器芯片 |
| 文件頁數(shù)： | 15/166頁 |
| 文件大?。?/td> | 2623K |
| 代理商： | EP7211 |
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EP7211
High-Performance Ultra-Low-Power System-on-Chip with LCD Controller
15
Pin Information
DS352PP3
JUL 2001
2.2.1
External Signal Functions
Function
Signal
Name
Signal
Description
Data bus
D[0
–
31]
I/O
32-bit system data bus for DRAM, ROM/SRAM/Flash, and memory mapped
I/O expansion
Address bus
A[0
–
14]
O
Least significant 15 bits of system byte address during ROM/SRAM/Flash and
expansion cycles
A[15]/
DRA[12]
–
A[27]/DRA[0]
O
13-bit multiplexed DRAM word address during DRAM cycles or address bits
16 to 27 of system byte address during ROM/SRAM/Flash and expansion
cycles
–
Whenever the EP7211 is in the Standby State, the external address and
data buses are driven low. The
RUN
signal is used internally to force these
buses to be driven low. This is done to prevent peripherals that are power-
down from draining current. Also, the internal peripheral
’
s signals get set to
their Reset State
.
–
For additional power saving, the multiplexed DRAM address lines are output
on the high order ROM address lines where the lightest loading is expected.
Memory and
Expansion
Interface
NRAS[0
–
1]
O
DRAM RAS outputs to DRAM banks 0 to 1
NCAS[0
–
3]
I/O
DRAM CAS outputs for bytes 0 to 3 within 32-bit word
NMOE
O
DRAM, ROM/SRAM/Flash, and expansion output enable
NMWE
O
DRAM, ROM/SRAM/Flash, and expansion write enable
NCS[0
–
3]
O
Expansion channel I/O strobes; active low SRAM-like chip selects for expan-
sion
NCS[4
–
5]
O
Expansion channel I/O strobes; active low CS for expansion or for
CL-PS6700 select
EXPRDY
I/O
Expansion channel ready; external expansion devices drive this low to extend
the bus cycle
WRITE
O
Transfer direction, low during reads, high during writes from the
EP7211
WORD
O
Word access enable; driven high during word-wide cycles, low during byte-
wide cycles
HALFWORD
O
Half-Word access flag; driven high to denote upper half-word accesses
EXPCLK
I/O
Expansion clock rate is the same as the CPU clock for 13 MHz and 18 MHz. It
runs at 36.864 MHz for 36,49 and 74 MHz modes; in 13 MHz mode this pin is
used as the clock input
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EP7211-CP-A | HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER |
| EP7211-CV-A | HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER |
| EP7212 | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI) |
| EP7212-CB-A | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI) |
| EP7212-CV-A | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EP7211(208LQFP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC |
| EP7211(256PBGA) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC |
| EP7211-CB-D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| EP7211-CP-A | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER |
| EP7211-CV-A | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER |
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