Chapter 17 Voltage Regulator (S12VREG3V3V5)
MC9S12XDP512 Data Sheet, Rev. 2.11
742 Freescale Semiconductor
17.3.2.5 Autonomous Periodical Interrupt Rate High and Low Register(VREGAPIRH / VREGAPIRL)

The VREGAPIRH and VREGAPIRL register allows the configuration of the VREG_3V3 autonomous

periodical interrupt rate.

Module Base + 0x_04
76543210
R0000
APIR11 APIR10 APIR9 APIR8
W
Reset 00000000
= Unimplemented or Reserved

Figure 17-6. Autonomous Periodical Interrupt Rate High Register (VREGAPIRH)

Module Base + 0x_05
76543210
RAPIR7 APIR6 APIR5 APIR4 APIR3 APIR2 APIR1 APIR0
W
Reset 00000000

Figure 17-7. Autonomous Periodical Interrupt Rate Low Register (VREGAPIRL)

Table 17-7. VREGAPIRH / VREGAPIRL Field Descriptions

Field Description
11-0
APIR[11:0]
Autonomous Periodical Interrupt Rate Bits — These bits define the timeout period of the API. See Table 17-8
for details of the effect of the autonomous periodical interrupt rate bits. Writable only if APIFE = 0 of VREGAPICL
register.