C8051T322-GQR Silicon Labs, C8051T322-GQR Datasheet - Page 91

• Manufacturer Part Number: C8051T322-GQR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-LQFP32
• Manufacturer: Silicon Labs

Specifications of C8051T322-GQR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

16. Special Function Registers
The direct-access data memory locations from 0x80 to 0xFF constitute the special function registers
(SFRs). The SFRs provide control and data exchange with the C8051T620/621/320/321/322/323's
resources and peripherals. The CIP-51 controller core duplicates the SFRs found in a typical 8051 imple-
mentation as well as implementing additional SFRs used to configure and access the sub-systems unique
to the C8051T620/621/320/321/322/323. This allows the addition of new functionality while retaining com-
patibility with the MCS-51™ instruction set. Table 16.1 lists the SFRs implemented in the
C8051T620/621/320/321/322/323 device family.
The SFR registers are accessed anytime the direct addressing mode is used to access memory locations
from 0x80 to 0xFF. SFRs with addresses ending in 0x0 or 0x8 (e.g., P0, TCON, SCON0, IE, etc.) are bit-
addressable as well as byte-addressable. All other SFRs are byte-addressable only. Unoccupied
addresses in the SFR space are reserved for future use. Accessing these areas will have an indeterminate
effect and should be avoided. Refer to the corresponding pages of the data sheet, as indicated in
Table 16.2, for a detailed description of each register.
Table 16.1. Special Function Register (SFR) Memory Map
Note: SFR Addresses ending in 0x0 or 0x8 are bit-addressable locations and can be used with bitwise instructions.
F8 SPI0CN
F0
E8 ADC0CN PCA0CPL1 PCA0CPH1 PCA0CPL2 PCA0CPH2 PCA0CPL3 PCA0CPH3
E0
D8 PCA0CN
D0
C8 TMR2CN REG01CN TMR2RLL TMR2RLH
C0 SMB0CN
B8
B0
A8
A0
98
90
88
80
SCON0
TCON
PSW
ACC
0(8)
P3
P2
P1
P0
IP
IE
B
OSCXCN
SPI0CFG
PCA0MD PCA0CPM0 PCA0CPM1 PCA0CPM2 PCA0CPM3 PCA0CPM4
TMR3CN
REF0CN
SMB0CF
CLKMUL
CLKSEL
P0MDIN
SBUF0
PCA0L
TMOD
XBR0
1(9)
SP
SMB0DAT ADC0GTL ADC0GTH
TMR3RLL TMR3RLH
SPI0CKR
P1MASK
CPT1CN
OSCICN
P1MDIN
EMI0CN
SCON1
PCA0H
XBR1
DPL
2(A)
TL0
C8051T620/621/320/321/322/323
PCA0CPL0 PCA0CPH0 PCA0CPL4 PCA0CPH4
SPI0DAT
CPT0CN
P2MDIN
OSCICL
AMX0P
SBUF1
XBR2
DPH
3(B)
TL1
-
Rev. 1.1
PCA0PWM
P0MDOUT P1MDOUT P2MDOUT
SBCON1
CPT1MD
ADC0CF
SBRLL1
P0SKIP
IT01CF
TMR3L
TMR2L
P0MAT
4(C)
TH0
ADC0LTL
CPT0MD
SBRLH1
EMI0CF
SMOD1
P1SKIP
TMR2H
TMR3H
ADC0L
IAPCN
TH1
5(D)
-
USB0ADR
ADC0LTH
P0MASK
CPT1MX
OSCLCN
CKCON
P2SKIP
ADC0H
P1MAT
EIP1
EIE1
6(E)
-
SMB0ADM
SMB0ADR
P3MDOUT
USB0XCN
USB0DAT
MEMKEY
VDM0CN
RSTSRC
CPT0MX
PFE0CN
PSCTL
PCON
EIE2
EIP2
7(F)
-
-
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