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参数资料
| 型号： | PIC16LCE624-04E/P |
| 厂商： | Microchip Technology |
| 文件页数： | 38/100页 |
| 文件大小： | 0K |
| 描述： | IC MCU CMOS 1K OTP W/EEPRM 18DIP |
| 标准包装： | 25 |
| 系列： | PIC® 16C |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 4MHz |
| 外围设备： | 欠压检测/复位，POR，WDT |
| 输入/输出数： | 13 |
| 程序存储器容量： | 1.75KB（1K x 14） |
| 程序存储器类型： | OTP |
| EEPROM 大小： | 128 x 8 |
| RAM 容量： | 96 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.5 V ~ 5.5 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 18-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
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PIC16CE62X
DS40182C-page 32
1999 Microchip Technology Inc.
6.3
Write Operations
6.3.1
BYTE WRITE
Following the start signal from the processor, the
device code (4 bits), the don’t care bits (3 bits), and the
R/W bit, which is a logic low, is placed onto the bus by
the processor. This indicates to the EEPROM that a
byte with a word address will follow after it has gener-
ated an acknowledge bit during the ninth clock cycle.
Therefore, the next byte transmitted by the processor is
the word address and will be written into the address
pointer of the EEPROM.
After receiving another
acknowledge signal from the EEPROM, the processor
will transmit the data word to be written into the
addressed memory location. The EEPROM acknowl-
edges again and the processor generates a stop con-
dition. This initiates the internal write cycle, and during
this time, the EEPROM will not generate acknowledge
signals (Figure 6-5).
6.3.2
PAGE WRITE
The write control byte, word address and the first data
byte are transmitted to the EEPROM in the same way
as in a byte write. But instead of generating a stop con-
dition, the processor transmits up to eight data bytes to
the EEPROM, which are temporarily stored in the on-
chip page buffer and will be written into the memory
after the processor has transmitted a stop condition.
After the receipt of each word, the three lower order
address pointer bits are internally incremented by one.
The higher order five bits of the word address remains
constant. If the processor should transmit more than
eight words prior to generating the stop condition, the
address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the stop condition is received, an inter-
nal write cycle will begin (Figure 6-6).
6.4
Acknowledge Polling
Since the EEPROM will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write com-
mand has been issued from the processor, the
EEPROM initiates the internally timed write cycle. ACK
polling can be initiated immediately. This involves the
processor sending a start condition followed by the
control byte for a write command (R/W = 0). If the
device is still busy with the write cycle, then no ACK will
be returned. If no ACK is returned, then the start bit and
control byte must be re-sent. If the cycle is complete,
then the device will return the ACK and the processor
can then proceed with the next read or write command.
See Figure 6-4 for flow diagram.
FIGURE 6-4:
ACKNOWLEDGE POLLING
FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did EEPROM
Acknowledge
(ACK = 0)?
Next
Operation
NO
YES
FIGURE 6-5:
BYTE WRITE
S
P
BUS ACTIVITY
PROCESSOR
SDA LINE
BUS ACTIVITY
S
T
A
R
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS
DATA
A
C
K
A
C
K
A
C
K
10
X
10
X
XX
X = Don’t Care Bit
0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC16LCE624-04I/P | 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC16LCE624-04I/SO | 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC16LCE624-04I/SS | 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC16LCE624T-04/SO | 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC16LCE624T-04/SS | 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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