W7100A WIZnet, W7100A Datasheet - Page 31

• 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.
signal to classify the address and data signal. User can configure the duration of ALE signal
using the ALECON(0x9F) SFR. For more detailed information about ALECON, please refer to
the section 2.5.10 ‘New & Extended SFR’.
2.3.2 Direct Interface
to “101”, the port0 is used as data line (D[7:0]) and the port1 is lower side address (A[7:0])
and the port2 is used as upper side address (A[15:8]). The remained port3 can be used as
GPIO. Using this method, user can connect data line to address line without latch. It is shown
the figure 2.8 as below.
previous case and the port3 is used as topside address (A[23:16]). In this method, there is no
port to use GPIO. It is shown the figure below.
In the Standard 8051 External pin access mode, MCU controls the ALE (Address Latch Enable)
This method is directly connecting the data line to address line. When user sets the EM[2:0]
When user sets the EM[2:0] to “111”, the port0, port1 and port2 has same usage in the
Figure 2.9 Direct 8051 External Pin Access Mode (EM[2:0] = “111”)
Figure 2.8 Direct 8051 External Pin Access Mode (EM[2:0] = “101”)
EM[2:0]=101
WCONF
(0xFF)
W7100A
P0[7:0]
P1[7:0]
P2[7:0]
P3[7:0]
A[7:0]
A[15:8]
D[7:0]
GPIO
A[15:0]
External
Device
Ver. 1.12
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