User guide

Evaluation Kit Hardware
4-10 Evaluation Kit (EK) User Guide
11115A–ATARM–27-Jul-11
4.2.3.6 Serial Peripheral Interface (SPI) Controller
The serial processor provides two high-speed Serial Peripheral Interface (SPI) controllers. One port is
used to interface with the on-board serial DataFlash
®
.
Figure 4-5. SPI
4.2.3.7 Two Wire Interface (TWI)
The serial processor has a full speed (400 kHz) master/slave TWI Serial Controller. The controller is
mostly compatible with industry standard I2C and SMBus Interfaces. This port is used to interface with
the on-board Serial EEPROM, ISI, QTouch device and audio codec interface.
Figure 4-6. TWI
4.2.3.8 1-Wire EEPROM
The Evaluation Kit uses a 1-Wire device as “firmware label” to store the information such as chip type,
manufacturer’s name, production date etc.
Figure 4-7. 1-Wire Device
R57 0R
R58 0R
R59 0R
VDDIOP0
VDDIOP0
PA13
PA12
PA11
(SPI0_MIS0)
MN7
AT25DF321
HOLD
7
GND
4
VCC
8
CS
1
SCK
6
SI
5
SO
2
WP
3
(SPI0_MOSI)
(SPI0_SPCK)
(SPI0_NPCS0)
C69
100nF
2
ON
SW1B
SWITCH-2-1.27mm
2 3
PA14
R56
470K
VDDIOP0
R63
10K
VDDIOP0 VDDIOP0
PA30
PA31
MN8
AT24C512BN-SH25-B
A0
1
A1
2
WP
7
SCL
6
VCC
8
A3
3
SDA
5
GND
4
(TWCKO)
(TWDO)
R61
4.7K
VDDIOP0 R64
DNP
R62
4.7K
C70
100nF
MN9
DS2431P+
IO
2
GND
1
NC1
3
NC2
4
NC3
5
NC4
6
VDDANA
R66 0R
PB18
R65
1.5K