W7100A WIZnet, W7100A Datasheet - Page 29

• Manufacturer Part Number: W7100A
• Description: 8-bit Microcontrollers - MCU 8051 CORE+HARDWIRED TCP/IP+MAC+PHY
• Manufacturer: WIZnet

Specifications of W7100A

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 255 B
• Data Ram Size: 64 KB
• On-chip Adc: No
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 80 C
• Package / Case: LQFP-100
• Mounting Style: SMD/SMT
• Interface Type: UART
• Program Memory Type: Flash

© Copyright 2011 WIZnet Co., Inc. All rights reserved.
2.2
Data FLASH. The Data FLASH can be used for saving user IP, MAC, subnet mask or port number.
Also the W7100A can address up to 16M bytes of external Data Memory. The figure below
shows the Data Memory map. This memory is accessed by MOVX instructions only. The
external memory can be extended by user.
2.2.1 Data Memory Wait States
fixed to the value stored inside CKCON register. Please refer to the section 2.5.10 ‘New &
Extended SFR’ for more detailed information.
2.3
to address line in standard 8051. And the second method is directly connecting all lines to
address line. Also user can use address pin and data pin as GPIO (General Purpose I/O). Please
refer to the section 10 ‘Electrical specification’ for the speed of external memory accessing.
Standard 1
Standard 2
The W7100A contains 64KB of embedded RAM, 64KB of TCPIPCore and the 255Byte of the
The Data Memory wait states are managed by CKCON(0x8E). The number of wait states is
The external address pin and data pin has two access modes. The first mode is to use latch
Direct 1
Direct 2
Mode
Data Memory
External Data Memory Access
EM[2:0]
001
011
101
111
Table 2.1 External memory access mode
Addr[7:0]/Data[7:0]
Addr[7:0]/Data[7:0]
Figure 2.5 Data Memory Map
Data[7:0]
Data[7:0]
P0
Addr[7:0]
Addr[7:0]
GPIO
GPIO
P1
Addr[15:8]
Addr[15:8]
Addr[15:8]
Addr[15:8]
P2
Ver. 1.12
Addr[23:16]
Addr[23:16]
GPIO
GPIO
P3
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