參數(shù)資料
型號(hào)： TEA5777HL/N2,118
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 接收器
英文描述： AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP32
封裝： 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-358-1, LQFP-32
文件頁(yè)數(shù)： 11/47頁(yè)
文件大小： 219K
代理商： TEA5777HL/N2,118
TEA5777_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 11 April 2006
19 of 47
Philips Semiconductors
TEA5777
Low-power AM/FM stereo radio for handheld applications
9.4.2 Read mode
At the falling edge of signal WRITE_READ the bus interface is set to the read mode. Data
is clocked out on every falling edge of the input clock. In the read mode, pin DATA
becomes an open-collector output and an external pull-up resistor is required.
9.4.3 Dbus function in 3-wire mode (silent readout)
Bus pins CLOCK and DATA are bidirectional and act as inputs when bit DBUS = 0, but are
open-collector outputs when bit DBUS = 1. External pull-up resistors are required in this
case.
In Dbus mode, pins CLOCK and DATA are used for output data and pin WRITE_READ is
used as an input.
With a rising edge (write mode) or falling edge (read mode) of signal WRITE_READ the
Dbus mode is deactivated and a transmission is started.
The Dbus mode is activated with bit DBUS = 1 and after transfer of all 6 data bytes in the
write mode or all 3 data bytes in the read mode.
Data on pins CLOCK and DATA in the Dbus mode is given in Table 8.
[1]
H = HIGH-level output voltage
L = LOW-level output voltage
Fig 6.
3-wire bus read data
001aae435
50 %
tsu(clk)
tclk(H)
tclk(L)
td(Q)
th(Q)
tw(R)
50 %
WRITE_READ
CLOCK
DATA
Table 8.
CLOCK and DATA lines in Dbus-mode
Bit
Pin CLOCK
Pin DATA
DBUS
SEARCH IFCE
Signal
Status[1]
Signal
Status[1]
0
X
input
-
input
-
1
0
IFC ag
H = IF in-window mono/stereo ag H = stereo, L = mono
1
IFC ag
H = IF in-window IFCRDY ag
H = IF counter ready
1
X
SFOUND
ag
H = station found BLIM ag
H = band limit
reached
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