ST92F120V1Q7 STMicroelectronics, ST92F120V1Q7 Datasheet - Page 30

• Manufacturer Part Number: ST92F120V1Q7
• Description: Microcontrollers (MCU) Flash 128K SPI/I2C
• Manufacturer: STMicroelectronics

Specifications of ST92F120V1Q7

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 4 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 77
• Number Of Timers: 5
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 16 Channel
• Lead Free Status / Rohs Status: No

ST92F120 - DEVICE ARCHITECTURE
SYSTEM REGISTERS (Cont’d)
USER STACK POINTER HIGH REGISTER
(USPHR)
R236 - Read/Write
Register Group: E (System)
Reset value: undefined
USER STACK POINTER LOW REGISTER
(USPLR)
R237 - Read/Write
Register Group: E (System)
Reset value: undefined
Figure 15. Internal Stack Mode
30/324
USP15 USP14 USP13 USP12 USP11 USP10 USP9
9
USP7
7
7
USP6
4
3
2
1
0
F
E
D
REGISTER
STACK
USP5
FILE
USP4
USP3
STACK POINTER (LOW)
points to:
USP2
USP1
USP8
USP0
0
0
SYSTEM STACK POINTER HIGH REGISTER
(SSPHR)
R238 - Read/Write
Register Group: E (System)
Reset value: undefined
SYSTEM STACK POINTER LOW REGISTER
(SSPLR)
R239 - Read/Write
Register Group: E (System)
Reset value: undefined
Figure 16. External Stack Mode
SSP15 SSP14 SSP13 SSP12 SSP11 SSP10 SSP9
SSP7
7
7
4
3
2
1
0
F
E
D
SSP6
REGISTER
FILE
SSP5
SSP4
STACK POINTER (HIGH)
STACK POINTER (LOW)
SSP3
point to:
&
SSP2
MEMORY
STACK
SSP1
SSP8
SSP0
0
0