Harman Kardon DVD 27 Service Manual page 45

DVD27
ST72F324L, ST72324BL
1 INTRODUCTION
The ST72F324L and ST72324BL devices are
members of the ST7 microcontroller family de-
signed for the 3V operating range. They can be
grouped as follows:
– The 32-pin devices are designed for mid-range
applications
– The 44-pin devices target the same range of ap-
plications requiring more than 24 I/O ports.
All devices are based on a common industry-
standard 8-bit core, featuring an enhanced instruc-
Figure 1. Device Block Diagram
RESET
V
PP
V
SS
V
DD
OSC1
OSC2
PF7:6,4,2:0
(6 bits on J devices)
(5 bits on K devices)
PE1:0
(2 bits)
PD5:0
(6 bits on J devices)
(2 bits on K devices)
V
AREF
V
SSA
8-BIT CORE
ALU
CONTROL
OSC
MCC/RTC/BEEP
PORT F
TIMER A
BEEP
PORT E
SCI
PORT D
10-BIT ADC
45
tion set and are available with FLASH or ROM pro-
gram memory.
Under software control, all devices can be placed
in WAIT, SLOW, ACTIVE-HALT or HALT mode,
reducing power consumption when the application
is in idle or stand-by state.
The enhanced instruction set and addressing
modes of the ST7 offer both power and flexibility to
software developers, enabling the design of highly
efficient and compact application code. In addition
to standard 8-bit data management, all ST7 micro-
controllers feature true bit manipulation, 8x8 un-
signed multiplication and indirect addressing
modes.
PROGRAM
MEMORY
(8K - 60K Bytes)
RAM
(384 - 2048 Bytes)
WATCHDOG
PORT A
PORT B
PORT C
TIMER B
SPI
harman/kardon
PA7:3
(5 bits on J devices)
(4 bits on K devices)
PB4:0
(5 bits on J devices)
(3 bits on K devices)
PC7:0
(8 bits)
3