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UPSD3422 Datasheet(PDF) 31 Page - STMicroelectronics |
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UPSD3422 Datasheet(HTML) 31 Page - STMicroelectronics |
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31 / 293 page  uPSD34xx Special function registers (SFR) 31/293 8 Special function registers (SFR) A group of registers designated as Special Function Register (SFR) is shown in Table 5 on page 32. SFRs control the operating modes of the MCU core and also control the peripheral interfaces and I/O pins on the MCU Module. The SFRs can be accessed only by using the Direct Addressing method within the address range from 80h to FFh of internal 8032 SRAM. Sixteen addresses in SFR address space are both byte- and bit-addressable. The bit- addressable SFRs are noted in Table 5. 106 of a possible 128 SFR addresses are occupied. The remaining unoccupied SFR addresses (designated as “RESERVED” in Table 5) should not be written. Reading unoccupied locations will return an undefined value. Note: There is a separate set of control registers for the PSD Module, designated as csiop, and they are described in the Section 28: PSD module on page 185. The I/O pins, PLD, and other functions on the PSD Module are NOT controlled by SFRs. SFRs are categorized as follows: ● MCU core registers: IP, A, B, PSW, SP, DPTL, DPTH, DPTC, DPTM ● MCU Module I/O Port registers: P1, P3, P4, P1SFS0, P1SFS1, P3SFS, P4SFS0, P4SFS1 ● Standard 8032 Timer registers TCON, TMOD, T2CON, TH0, TH1, TH2, TL0, TL1, TL2, RCAP2L, RCAP2H ● Standard Serial Interfaces (UART) SCON0, SBUF0, SCON1, SBUF1 ● Power, clock, and bus timing registers PCON, CCON0, CCON1, BUSCON ● Hardware watchdog timer registers WDKEY, WDRST ● Interrupt system registers IP, IPA, IE, IEA ● Prog. Counter Array (PCA) control registers PCACL0, PCACH0, PCACON0, PCASTA, PCACL1, PCACH1, PCACON1, CCON2, CCON3 ● PCA capture/compare and PWM registers CAPCOML0, CAPCOMH0, TCMMODE0, CAPCOML1, CAPCOMH1, TCMMODE2, CAPCOML2, CAPCOMH2, TCMMODE2, CAPCOML3, CAPCOMH3, TCMMODE3, |
Similar Part No. - UPSD3422_06 |
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Similar Description - UPSD3422_06 |
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