ST92196A STMicroelectronics, ST92196A Datasheet - Page 34

• Manufacturer Part Number: ST92196A
• Description: 8/16-bit Mcu For Tv Applications With Up To 96k Rom, On-screen-display And 1 Or 2 Data Slicers
• Manufacturer: STMicroelectronics

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 11. Internal Stack Mode
USP15 USP14 USP13 USP12 USP11 USP10 USP9
USP7 USP6 USP5 USP4 USP3 USP2 USP1 USP0
7
7
4
3
2
1
0
F
E
D
REGISTER
STACK
FILE
STACK POINTER (LOW)
points to:
USP8
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 12. External Stack Mode
SSP15 SSP14 SSP13 SSP12 SSP11 SSP10 SSP9
SSP7 SSP6
7
7
4
3
2
1
0
F
E
D
REGISTER
FILE
SSP5
DEVICE ARCHITECTURE
SSP4 SSP3
STACK POINTER (HIGH)
STACK POINTER (LOW)
point to:
&
SSP2 SSP1
MEMORY
STACK
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SSP8
SSP0
0
0