ATSAM2195 ATMEL [ATMEL Corporation], ATSAM2195 Datasheet - Page 3

• Manufacturer Part Number: ATSAM2195
• Description: Audio Processing
• Manufacturer: ATMEL [ATMEL Corporation]

Table 2-2.
Table 2-3.
Table 2-4.
6308A–DRMSD–10-May-07
Pin Name
MIDI IN
D0-D7
A0
CS
RD
WR
IRQ
Pin Name
AGNDREF
VREF
VCM
VBG
AOUTL
AOUTR
Pin Name
OUTLEV
DITH0-DITH1
Serial MIDI, parallel MIDI (MPU-401)
Analog audio group
Digital audio group
Pin #
10
15, 16, 17, 18,
22, 23, 24, 25
11
12
13
14
26
Pin #
42
41
40
3
1
5
Pin #
6
7, 8
Type
IN
I/O
IN
IN
IN
IN
OUT
Type
IN
OUT
OUT
OUT
OUT
OUT
Type
IN
IN
Function
Serial TTL MIDI IN. Connected to the built-in synthesizer at power-up or after
MPU reset. Connected to the D0-D7 bus (read mode) when MPU switched to
UART mode. This pin should be tied HIGH if not used.
8 bit bi-directional bus, under control of CS, RD, WR. These pins have a built-in
pull down. They should be left unconnected if not used
Select data(0) or control(1) for write, data(0) or status(1) for read. This pin has a
built-in pull-down. It should be left unconnected if not used.
Chip select, active low. This pin has a built-in pull up. It should be left
unconnected if not used.
Read, active low. When CS and RD are low, data(A0=0) or status(A0=1) is read
on D0-D7. Read data is acknowledged on the rising edge of RD. This pin has a
built-in pull up. It should be left unconnected if not used.
Write, active low. When CS and WR are low, data (A0=0) or control (A0=1) is
written from the D0-D7 bus to the ATSAM2195 on the rising edge of WR. This pin
has a built-in pull up. It should be left unconnected if not used.
A rising edge indicates that a MIDI byte is available for read on D0-D7.
Acknowledged by reading the byte.
Function
These pin is used as a reference by the internal DAC. It should be connected to a
clean analog ground plane
Reference voltage. Generated on-chip. Should be stabilized by external
capacitors 10 µF // 100 nF to AGND.
On-chip output stage common-mode voltage. Should be stabilized by external
capacitors 10 µF // 100 nF to AGND.
Bandgap voltage. Can be stabilized by capacitors 1µF // 100 nF to AGND. Can be
left unconnected for low-cost application.
Left channel audio output
Right channel audio output
Function
Selects the full scale output level for AOUTL and AOUTR.
OUTLEV = 0 for 1.1Vpp
OUTLEV = 1 for 2.2Vpp
If 1.8V single supply (VA33 = 1.8V), OUTLEV should be tied to 0.
Activate a dither signal to reduce eventual noise tones at the output. See Dither
Modes Description.
ATSAM2195
3