tea5777hn-n2 NXP Semiconductors, tea5777hn-n2 Datasheet - Page 18

• Manufacturer Part Number: tea5777hn-n2
• Description: Tea5777 Low-power Am/fm Stereo Radio For Handheld Applications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TEA5777_1
Product data sheet
9.4.1 Write mode
9.4 3-wire bus mode
Table 7.
[1]
For the 3-wire bus mode pin BUSMODE = HIGH, i.e. connected to V
CLOCK, DATA and WRITE_READ are used to communicate with the external hardware
(microcontroller or PC). The bus operates at a maximum clock of 1 MHz.
The selected mode (read or write mode) is determined by the rising or falling edge of
signal WRITE_READ.
At the rising edge of signal WRITE_READ the bus interface is set to the write mode. At
every rising edge of the clock input (CLOCK) the data is clocked in. Signal DATA has to be
stable before it can be clocked in.
Bit
DBUS
0
1
Fig 5. 3-wire bus write data
WRITE_READ
H = HIGH-level output voltage
L = LOW-level output voltage
CLOCK
DATA
SEARCH IFCE
X
0
0
1
Definition pin WRITE_READ functionality in I
X
0
1
X
t
w(W)
Rev. 01 — 11 April 2006
Low-power AM/FM stereo radio for handheld applications
50 %
t
su(clk)
Pin WRITE_READ
Output signal
3-state
mono or stereo flag
IFCRDY flag
SFOUND or BLIM flag
50 %
50 %
t
su(D)
50 %
Status
not applicable
H = stereo, L = mono
H = IF counter ready
H = station found or band limit reached
2
C-bus Dbus mode
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
valid data
[1]
t
h(D)
CCA
TEA5777
. The pins
001aae434
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