ES2898 Datasheet, PDF (5/6 Pages) List of Unclassifed Manufacturers – V.90 PCI DSP Modem Solution

ES2898/ES2828 PRODUCT BRIEF
Table 2 ES2828 Pin Descriptions
Names
Pin Numbers I/O
Definitions
DPBX
1
I Digital PBX detection.
ACLINK/GPIO_B
2
I/O Default for CHI bus mode (internal pulldown). Pull high for AC-Link mode.
DVDD
3, 23, 29
P 3.3V digital power.
AGND
4:6, 18
I Analog ground.
AUX+
7
I Codec analog auxiliary differential positive input. The DC level is Vcm, and the full-scale input is
either 0.22 Vp-p ±5% or 1.1 Vp-p±5%, depending on the gain setting.
AUX-
8
I Codec analog auxiliary differential negative input. The DC level is Vcm, and the full-scale input is
either 0.22 Vp-p ±5% or 1.1 Vp-p±5%, depending on the gain setting.
RXIN+
9
I Codec analog differential positive input. The DC level is Vcm, and the full-scale input is either 0.22
Vp-p ±5% or 1.1 Vp-p±5%, depending on the gain setting.
RXIN-
10
I Codec analog differential negative input. The DC level is Vcm, and the full-scale input is either
0.22 Vp-p ±5% or 1.1 Vp-p±5%, depending on the gain setting.
AVDD
11
I Analog 5.0V supply.
VCM
12
O Common mode voltage bypass 1. Has a range of 2.16V±5%. Bypass to VCBP with 0.1-µF
ceramic chip capacitor parallel with 10-µF tantalum capacitor.
VCBP
13
I Ground pin for VCM.
VREF
14
O Voltage reference bypass. Has a range of 1.2356V±5%. Bypass to VRBP with 0.1-µF ceramic
chip capacitor parallel with 10-µF tantalum capacitor.
VRBP
15
I Ground pin for VREF.
TX+
16
O Codec positive analog output. The DC level is Vcm, and the full-scale ac output is either 2.8V
p-p±5% or 1.4V p-p±5%, depending on the gain setting. The maximum loading is 1k Ω, in parallel
with 20 pF for modem applications. For audio applications with low-impedance load, the maximum
distortion-free (THD <–60 db) current is 10 mA rms.
TX-
17
O Codec negative analog output. The DC level is Vcm, and the full-scale ac output is either 2.8V
p-p±5% or 1.4V p-p±5%, depending on the gain setting. The maximum loading is 1k Ω, in parallel
with 20 pF for modem applications. For audio applications with low-impedance load, the maximum
distortion-free (THD <–60 db) current is 10 mA rms.
VCMX
19
O Codec common mode reference voltage output. 2.16V±5%, maximum current ±500 µA, maximum
capacitive load 20 pF.
HCT
20
I Codec digital input mode control.
DGND
21, 44
P Digital ground.
CTST
22
I Codec sigma delta modulator test port output enable.
SI
24
I Serial port input (default).
SO
25
O Serial port output without V_AUX support.
SC
26
I/O Serial port clock output. While input must be TTL-compatible, should be able to handle 3.3V input.
FS
27
O Serial port frame sync.
CKO
28
O 3.3V clock output.
XTALO
30
O 24.576-MHz crystal oscillator output.
XTALI
31
I 24.576-MHz crystal oscillator input.
RST#
32
I Reset.
ESS Technology, Inc.
SAM0402-050301
5