AT77C104BCH08YV Atmel, AT77C104BCH08YV Datasheet - Page 18

• Manufacturer Part Number: AT77C104BCH08YV
• Manufacturer: Atmel

Specifications of AT77C104BCH08YV

• Lead Free Status / Rohs Status: Compliant

10.5
18
NAVFREQ
(MSB)
Navctrl Register
b6
1
AT77C104B
NAVFREQ (LSB)
Register Name: Navctrl (7 bits)
Access Type: Read/Write
Function: Navigation control
A faster frequency enables faster finger movement detection. A lower frequency enhances sen-
sitivity. Refer to notes 1 and 2 on
Sets the minimum analog value detected as a high level (‘1’). Refer to note 1 on
Sets the minimum analog value detected as a high level (‘1’) and the maximum analog value
detected as a low level (‘0’). See note 3.
Notes:
b5
0
• NAVFREQ: Navigation Frequency
• NAVV: Navigation Pixels Threshold
• CLICKV: Click Pixels Threshold
00: 5.8 kHz
01: 2.9 kHz (default value)
10: 1.9 kHz
11: 1.5 kHz
00: lower threshold
01:
10:
11: higher threshold
00: lower threshold
01:
10: higher threshold
11: reserved
1. Navfreq and Navv registers should not be changed once the navigation mode is selected. Fin-
2. The navigation frequency is the frequency needed for the reading of one new navigation
3. The Clickv register should not be changed once the click mode is selected.
ger sensitivity refers to the minimum level of information required from a finger. The sensitivity
is linked to the integration time; a longer integration time enables better sensitivity but does not
tolerate fast movement.
frame.
NAVV ( MSB)
b4
0
NAVV (LSB)
page
b3
0
18.
CLICKV (MSB)
b2
0
CLICKV (LSB)
b1
0
page
5347F–BIOM–3/08
18.
reserved
b0
0