ST7LITEU09 STMicroelectronics, ST7LITEU09 Datasheet - Page 16

• Manufacturer Part Number: ST7LITEU09
• Description: ST7ULTRALITE - 8-BIT MCU WITH 2K SINGLE VOLTAGE FLASH MEMORY, ADC, TIMERS
• Manufacturer: STMicroelectronics

Specifications of ST7LITEU09

• 2k Bytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• 128 Bytes Data Eeprom. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• Clock Sources: internal trimmable 8MHz RC oscillator, internal low power, low frequency RC oscillator or external clock
• Five Power Saving Modes: Halt, Auto Wake Up from Halt, Active-Halt, Wait and Slow
• One 8-bit Lite Timer (lt) With Prescaler Including: watchdog, 1 realtime base and 1 input capture

Register & memory map
3
Note:
16/139
Register & memory map
As shown in
registers.
The available memory locations consist of 128 bytes of register locations, 128 bytes of RAM
and 1 Kbyte of user program memory. The RAM space includes up to 64 bytes for the stack
from 00C0h to 00FFh.
The highest address bytes contain the user reset and interrupt vectors.
The Flash memory contains two sectors (see
addressing space so the reset and interrupt vectors are located in Sector 0 (FC00-FFFFh).
The size of Flash Sector 0 and other device options are configurable by Option byte.
Important: Memory locations marked as “Reserved” must never be accessed. Accessing a
reseved area can have unpredictable effects on the device.
Figure 5.
1. see
DEE0h, DEE1h, DEE2h and DEE3h addresses are located in a reserved area but are
special bytes containing also the RC calibration values which are read-accessible only in
user mode. If all the EEPROM data or Flash space (including the RC calibration values
locations) has been erased (after the readout protection removal), then the RC calibration
values can still be obtained through these addresses.
FFDFh
0FFFh
F7FFh
FFE0h
FFFFh
00FFh
0000h
007Fh
0080h
0100h
1000h
107Fh
1080h
F800h
Section 7.2 on page
Interrupt & reset vectors
(see
Figure
Memory map
Flash memory
HW registers
(see
(128 Bytes)
(128 Bytes)
Table
EEPROM
Reserved
Reserved
Data
RAM
(2K)
Table
5, the MCU is capable of addressing 64 Kbytes of memories and I/O
10)
)
32.
F800h
FBFFh
FC00h
FFFFh
00FFh
0080h
00C0h
Short addressing
RAM (zero page)
PROGRAM MEMORY
64-Byte Stack
Figure
2K FLASH
SECTOR 1
SECTOR 0
1 Kbyte
1 Kbyte
5) mapped in the upper part of the ST7
DEE0h
DEE1h
DEE2h
DEE3h
1)
ST7LITEU05 ST7LITEU09
RCCRH0
RCCRL0
RCCRH1
RCCRL1