Document
ST72321Bxxx-Auto
8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface
Features
Memories
■ 32 to 60 Kbyte dual voltage High Density Flash
(HDFlash) ROM with readout protection capability. In-application programming and in-
)circuit programming for HDFlash devices t(s■ 1 to 2 Kbyte RAM c■ HDFlash endurance: 100 cycles, data retention u20 years rodClock, reset and supply management P■ Enhanced low voltage supervisor (LVD) for
main supply and auxiliary voltage detector
te(AVD) with interrupt capability le■ Clock sources: crystal/ceramic resonator ooscillators, internal RC oscillator and bypass sfor external clock b■ PLL for 2x frequency multiplication O■ 4 power saving modes: Halt, Active Halt, Wait -and Slow t(s)Interrupt management c■ Nested interrupt controller u■ 14 interrupt vectors plus trap and reset d■ Top Level Interrupt (TLI) pin on 64-pin devices ro■ 15/9 external interrupt lines (on 4 vectors) P1 analog peripheral (low current coupling) olete■ 10-bit ADC with up to 16 input ports
LQFP64 10 x 10
LQFP64 14 x 14
LQFP44 10 x 10
Up to 48 I/O ports
■ 48/32/24 multifunctional bidirectional I/O lines ■ 34/22/17 alternate function lines ■ 16/12/10 high sink outputs
5 timers
■ Main clock controller with Real-time base, Beep and Clock-out capabilities
■ Configurable watchdog timer
■ Two 16-bit timers with 2 input captures, 2 output compares, external clock input on 1 timer, PWM and pulse generator modes
■ 8-bit PWM auto-reload timer with 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector
3 communications interfaces
■ SPI synchronous serial interface ■ SCI asynchronous serial interface ■ I2C multimaster interface
Development tools
■ Full HW/SW development pkg, ICT capability
ObsTable 1. Device summary
Device
Prog. memory RAM (stack) Oper. voltage Temp. range
Package
ST72321BR9-Auto ST72321BAR9-Auto ST72321BJ9-Auto ST72321BR7-Auto ST72321BAR7-Auto ST72321BJ7-Auto ST72321BR6-Auto ST72321BAR6-Auto ST72321BJ6-Auto
Flash/ROM 60 Kbytes
Flash/ROM 48 Kbytes
Flash/ROM 32 Kbytes
2048 (256) bytes
1536 (256) bytes
1024 (256) bytes
3.8 to 5.5V
LQFP64
LQFP44
Up to
LQFP64
-40 to 125°C LQFP44
LQFP64
LQFP44
14x14 10x10 10x10 14x14 10x10 10x10 14x14 10x10 10x10
September 2010
Doc ID 12898 Rev 2
1/244
www.st.com
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Contents
Contents
ST72321Bxxx-Auto
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2 Package pinout and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.1 Package pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 Register and memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
t(s)4 Flash program memory . . . . . . . . . . . . . . . . . . . . . . .