Справочник Пользователя для AMD Am188TMER
Peripheral Control Block
4-6
4.1.3
Processor Release Level Register (PRL, Offset F4h)
The Processor Release Level (PRL) Register (Figure 4-4) is a read-only register that
specifies the processor version. The format of the Processor Release Level Register is
shown in Figure 4-4.
specifies the processor version. The format of the Processor Release Level Register is
shown in Figure 4-4.
Figure 4-4
Processor Release Level Register (PRL, offset F4h)
The values of the PRL Register bits 15–8 are listed in Table 4-1.
Bits 15–9: Processor Release Level (PRL)—This field is a 7-bit, read-only identification
number that specifies the processor release level for either the Am186ER or Am188ER
microcontroller. Each release level is numbered one higher than the previous level.
number that specifies the processor release level for either the Am186ER or Am188ER
microcontroller. Each release level is numbered one higher than the previous level.
Bit 8:—This bit is 0 in the Am186ER microcontroller. This bit is 1 in the Am188ER
microcontroller.
microcontroller.
The values of bits 15–8 of the PRL Register for the Am186ER and Am188ER
microcontrollers are shown in Table 4-1.
microcontrollers are shown in Table 4-1.
Table 4-1
Processor Release Level (PRL) Register High-Order Byte Values
Bits 7–0: Reserved—Value is undefined
Bits 15–8
Processor Release Level
20h
Am186ER revision A
21h
Am188ER revision A
15
7
0
186/188
Reserved
PRL