AT45DB642D_09 Datasheet, PDF (4/58 Pages) ATMEL Corporation – 64-megabit 2.7-volt Dual-interface DataFlash

Table 2-1.
Symbol
SER/BYTE
Pin Configurations (Continued)
Name and Function
Serial/8-bit Interface Control: The DataFlash may be configured to utilize either its serial port or
8-bit port through the use of the serial/8-bit control pin (SER/BYTE). When the SER/BYTE pin is
held high, the serial port (SI and SO) of the DataFlash will be used for all data transfers, and the
8-bit port (I/O7 - I/O0) will be in a high impedance state. Any data presented on the 8-bit port
while SER/BYTE is held high will be ignored. When the SER/BYTE is held low, the 8-bit port will
be used for all data transfers, and the SO pin of the serial port will be in a high impedance state.
While SER/BYTE is low, any data presented on the SI pin will be ignored. Switching between the
serial port and 8-bit port should only be done while the CS pin is high and the device is not busy
in an internally self-timed operation.
The SER/BYTE pin is internally pulled high; therefore, if the 8-bit port is never to be used, then
connection of the SER/BYTE pin is not necessary. In addition, if the SER/BYTE pin is not
connected or if the SER/BYTE pin is always driven high externally, then the 8-bit input/output pins
(I/O7-I/O0), the VCCP pin, and the GNDP pin should be treated as “no connect”.
Asserted
State
Low
Type
Input
V_CC
GND
V_CCP
GNDP
Device Power Supply: The V_CC pin is used to supply the source voltage to the device.
Operations at invalid V_CC voltages may produce spurious results and should not be attempted.
Ground: The ground reference for the power supply. GND should be connected to the system
ground.
–
Power
–
Ground
8-bit Port Supply Voltage: The VCCP pin is used to supply power for the 8-bit input/output pins
(I/O7-I/O0). The VCCP pin needs to be used if the 8-bit port is to be utilized; however, this pin
should be treated as “no connect” if the SER/BYTE pin is not connected or if the SER/BYTE pin is
–
Power
always driven high externally.
8-bit Port Ground: The GNDP pin is used to provide ground for the 8-bit input/output pins (I/O7-
I/O0). The GNDP pin needs to be used if the 8-bit port is to be utilized; however, this pin should
be treated as “no connect” if the SER/BYTE pin is not connected or if the SER/BYTE pin is
–
Ground
always driven high externally.
Figure 2-1. TSOP Top View: Type 1
RDY/BUSY 1
RESET 2
WP 3
NC 4
NC 5
VCC 6
GND 7
NC 8
NC 9
NC 10
CS 11
SCK/CLK 12
SI 13
SO 14
28 NC
27 NC
26 I/O7
25 I/O6
24 I/O5
23 I/O4
22 VCCP
21 GNDP
20 I/O3
19 I/O2
18 I/O1
17 I/O0
16 SER/BYTE
15 NC
Figure 2-2. BGA Package Ball-Out (Top View)
12 3 4 5
A
NC
NC
NC
NC
B
NC SCK GND VCC NC
C
NC CS RDY/BSY WP NC
D
NC SO
SI RESET NC
E
NC NC
NC
NC
NC
Figure 2-3.
CASON Top View through Package
SI 1
SCK 2
RESET 3
CS 4
8 SO
7 GND
6 VCC
5 WP
4 AT45DB642D
3542K–DFLASH–04/09