参数资料
型号: 71M6511H-IGT
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64
封装: LQFP-64
文件页数: 31/98页
文件大小: 1278K
代理商: 71M6511H-IGT
71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 37 of 98
2005–2010 Teridian Semiconductor Corporation
V2.7
A Maxim Integrated Products Brand
On-Chip Resources
DIO Ports
The 71M6511/6511H includes up to 12 pins of general purpose digital I/O. These pins are dual function and can alternatively
be used as LCD drivers. Figure 8 shows a block diagram of the DIO section.
On reset or power-up, all DIO pins are inputs until they are configured for the desired direction. The pins are configured and
controlled by the DIO and DIO_DIR registers (SFRs) and by the five bits of the I/O register LCD_NUM (0x2020[4:0]). See the
description for LCD_NUM in the I/O RAM Section for a table listing the available segment pins versus DIO pins, depending on
the selection for LCD_NUM. Generally, increasing the value for LCD_NUM will configure an increasing number of general
purpose pins to be LCD segment pins, starting at the higher pin numbers.
COM0..3
LCD DISPLAY
DRIVER
DIGITAL I/O
LCD_EN
LCD_CLK
LCD_MODE
DIO_GP
SEG34/DIO14 ...
SEG37/DIO17
LCD_NUM
DIO_OUT
DIO_IN
LCD_NUM
PULSEV/W
SEG24/DIO4 ...
SEG31/DIO11
SEG0..SEG2
DIO_EEX
SEG3/SCLK
SEG4/SSDATA
SEG5/SFR
SEG6/SRDY
SEG7/
MUX_SYNC
SEG8..SEG19
Figure 8: DIO Ports Block Diagram
Each pin declared as DIO can be configured independently as an input or output with the bits of the DIO_DIRn registers. Table
52 lists the direction registers and configurability associated with each group of DIO pins. Table 53 shows the configuration for
a DIO pin through its associated bit in its DIO_DIR register.
DIO
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Pin number
--
37
38
39
40
41
42
43
44
--
20
21
Data Register bit
--
4
5
6
7
0
1
2
3
--
6
7
DIO0=P0 (SFR 0x80)
DIO1=P1 (SFR 0x90)
Direction Register
bit
--
4
5
6
7
0
1
2
3
--
6
7
DIO_DIR0 (SFR 0xA2)
DIO_DIR1 (SFR 0x91)
Internal Resources
Configurable
--
Y
--
N
DIO
16
17
18
19
20
21
22
23
Pin number
22
12
--
Data Register bit
0
1
--
DIO2=P2 (SFR 0xA0)
Direction Register
bit
0
1
--
DIO_DIR2 (SFR 0xA1)
Internal Resources
Configurable
N
--
Table 52: Data/Direction Registers and Internal Resources for DIO Pin Groups
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