Cypress CY8C21234 manual Internal Main Oscillator Frequency for 12 MHz, CPU Frequency 2.7V Nominal

CY8C21634, CY8C21534

CY8C21434, CY8C21334, CY8C21234

Table 26. 2.7V AC Chip-Level Specifications

Symbol	Description	Min	Typ	Max	Units	Notes
FIMO12	Internal Main Oscillator Frequency for 12 MHz	11.5	120	12.7[16,17,18]	MHz	Trimmed for 2.7V operation
						using factory trim values.
						See Figure 14 on page 18.
						SLIMO mode = 1.
FIMO6	Internal Main Oscillator Frequency for 6 MHz	5.75	6	6.35[16,17,18]	MHz	Trimmed for 2.7V operation
						using factory trim values.
						See Figure 14 on page 18.
						SLIMO mode = 1.
FCPU1	CPU Frequency (2.7V Nominal)	0.093	3	3.15[16,17]	MHz	24 MHz only for SLIMO
						mode = 0.
FBLK27	Digital PSoC Block Frequency (2.7V Nominal)	0	12	12.5[16,17,18]	MHz	Refer to the AC Digital Block
						Specifications.
F32K1	Internal Low Speed Oscillator Frequency	8	32	96	kHz
Jitter32k	32 kHz RMS Period Jitter	–	150	200	ns
Jitter32k	32 kHz Peak-to-Peak Period Jitter	–	1400	–
TXRST	External Reset Pulse Width	10	–	–	μs
FMAX	Maximum frequency of signal on row input or	–	–	12.3	MHz
	row output.
TRAMP	Supply Ramp Time	0	–	–	μs

Figure 16. 24 MHz Period Jitter (IMO) Timing Diagram

Jitter24M1

F24M

Figure 17. 32 kHz Period Jitter (ILO) Timing Diagram

Jitter32k

F32K1

Notes

16.2.4V < Vdd < 3.0V.

17.Accuracy derived from Internal Main Oscillator with appropriate trim for Vdd range.

18.See Application Note AN2012 “Adjusting PSoC Microcontroller Trims for Dual Voltage-Range Operation” for information on maximum frequency for user modules.

Document Number: 38-12025 Rev. *O Page 27 of 45

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