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參數(shù)資料
| 型號： | EM78M612CDM |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Universal Serial Bus Microcontroller Series |
| 中文描述： | 通用串行總線控制器系列 |
| 文件頁數(shù)： | 25/38頁 |
| 文件大?。?/td> | 1264K |
| 代理商： | EM78M612CDM |
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EM78M612
Universal Serial Bus Microcontroller Series
This specification may change without further notice
.
2004/4/28 V1.1
25
8.2.2 USB Application FIFOs
For USB Application, EM78M612 provides an 8-byte First-In-First-Out (FIFO) buffer for each
endpoint. The buffer cannot be accessed directly. However, a corresponding Data Byte
Pointer register for each endpoint is made available to address the individual byte of the
FIFO buffer. The content of the individual byte will map to a special register.
8.2.3
E
2
PROM
Four bytes of E
2
PROM are located in the IOCC ~ IOCF of control register Bank 1. The
stored data of E
2
PROM are not erased when the power is off and can be read and rewritten
by firmware. In some special case of applications, for example, cordless mouse controller,
E
2
PROM can store important data, such as the cordless mouse’s device identification
number.
A control register, RES (address
:
0x0E in Bank1) controls the E
2
PROM, that is, to read,
write, or to erase the data from E
2
PROM. Writing a command into this register will execute
an action to E
2
PROM. The command value is defined in the following table. Note that there
is an execution time lapse for each command. Before writing the next command into the
control register, allow enough time for the E
2
PROM to finish processing the previous
command.
Command Value
Action
Execution Time
0B_0000_0000
Read
1ms
0B_0000_0001
Write
9ms
0B_0000_0010
Erase
128ms
0B_0000_0011
Disable
N/A
8.3 I/O Ports
The EM78M612 has up to fifteen General Purposes I/O pins, which are classifies into two
port groups; Port 6 and Port 7. Each pin has an internal resistor that can be individually
selected by user. Notice that Pin 60 is a input only pin.The following describes the important
features of EM78M612 I/O pins.
8.3.1 Programmable Large Current
Port 7 has two pins; P70 and P71 that can drive large current of up to 30mA. The range of
driving current is from 3mA to 30mA, which is programmable. Use IOC8 [0,1] and IOC8 [4,5]
to control the sink current of P70/P71. The default current is 3mA.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EM78M612CFM | Universal Serial Bus Microcontroller Series |
| EM78M612CAP | High-Performance, Single-Ended, Current-Mode PWM Controllers |
| EM78M612CDP | High-Performance, Single-Ended, Current-Mode PWM Controllers |
| EM78M612CEM | Universal Serial Bus Microcontroller Series |
| EM78M612D | High-Performance, Single-Ended, Current-Mode PWM Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM78M612CDP | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller Series |
| EM78M612CEM | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller Series |
| EM78M612CFM | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller Series |
| EM78M612D | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller Series |
| EM78M612DAM | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller Series |
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