UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 20

• Manufacturer Part Number: UPSD3234A-40U6T
• Description: IC MCU 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3234A-40U6T

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, UART/USART, USB
• Peripherals: LVR, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 288KB (288K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Architecture overview
2.6
2.7
2.8
20/189
XRAM-DDC
The 256 bytes of XRAM-DDC used to support DDC interface is also available for system
usage by indirect addressing through the address pointer DDCADR and data I/O buffer
RAMBUF. The address pointer (DDCADR) is equipped with the post increment capability to
facilitate the transfer of data in bulk (for details refer to DDC Interface part). However, it is
also possible to address the RAM through MOVX command as normally used in the internal
RAM extension of 80C51 derivatives. XRAM-DDC FF00 to FFFF is directly addressable as
external data memory locations FF00 to FFFF via MOVX-DPTR instruction or via MOVX-Ri
instruction. When XRAM-DDC is disabled, the address space FF00 to FFFF can be
assigned to other resources.
XRAM-PSD
The 8 Kbytes of XRAM-PSD resides in the PSD module and can be mapped to any address
space through the DPLD (Decoding PLD) as defined by the user in PSDsoft Development
tool.
SFR
The SFRs can only be addressed directly in the address range from 80h to FFh.
gives an overview of the Special Function Registers. Sixteen address in the SFRs space are
both-byte and bit-addressable. The bit-addressable SFRs are those whose address ends in
0h and 8h. The bit addresses in this area are 80h to FFh.
Table 3.
Byte address
(in hexadecimal)
2Dh
2Ch
FFh
2Fh
2Eh
2Bh
2Ah
30h
29h
28h
27h
26h
25h
24h
23h
¯
MSB
RAM address
7F
77
6F
67
5F
57
4F
47
3F
37
2F
27
1F
7E
6E
5E
4E
3E
2E
1E
76
66
56
46
36
26
7D
6D
5D
4D
3D
2D
1D
75
65
55
45
35
25
UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
Bit address (hex)
7C
6C
5C
4C
3C
2C
1C
74
64
54
44
34
24
7B
6B
5B
4B
3B
2B
1B
73
63
53
43
33
23
7A
6A
5A
4A
3A
2A
1A
72
62
52
42
32
22
79
71
69
61
59
51
49
41
39
31
29
21
19
LSB
78
70
68
60
58
50
48
40
38
30
28
20
18
Byte address
(in decimal)
Table 15
255
48
47
46
45
44
43
42
41
40
39
38
37
36
35
¯