PBM 990 80
Block diagram
XI N
CS X IN
N CLK S Q E N
LP O S E L E C T
LP O X IN
LP O X O U T
NR ES ET
N S YS W AKUP
S Y S CLK R E Q
N PW R A V A IL
NPW R FA IL
E X T INT
OSC
Clock
S quarer
S e lector
P LL
ARM7
TDM I
Clock
D ividers
64kByte
SR AM
S ystem
C ontroller,
Tim ers,
W atchdog
Interrupt
C ontroller
4kByte
RO M
Flash memory chip
TESTEN
NTRS T
TCK
TM S
TDI
TDO
D ebug
&
T est I/F
4Mbit
or
8Mbit
F LA S H
GPIO
*)
U S BV T _ E B CW A K UP
*)
U A R T 1R I_ U S B D M
*)
R T 1D CD _ US BD P
*)
U A R T 1R T S
*)
UA RT1 D T R
*)
UA RT1 D SR
*)
U A R T 1CT S
UA RT1 R X
U A R T 1T X
G P IO B 2 .. B 7
S E R IA LC LK
*)
S E R IA LD A T A
*)
Misc.
C ontrol
PHY
USB
(Bidirectional
serial inter-
face/GPIO)
UA RT1
E ricsson
Bluetooth
C ore
Start De tect
&
A utobaud
TX O N
TX C LK
TX D A T A
RX ON
RX DATA
SYNTON
PX ON
PHDOFF
A N T SW
C D C LK
CMS
CDI
CDO
PC MCLK
PC MS YN C
PC MA
PC MB
*)
U A R T 2R T S
*)
U A R T 2C T S
U A R T 2R X
UA R T 2T X
UA RT2
*) These pins are optionally directly accessible via software registers,
see Functional description (page 13) for further information.
Figure 1. Block diagram.
2
ERICSSON [ ERICSSON ]
